Face masks depicting Russian President Vladimir Putin, right, and Russian opposition leader Alexei Navalny, among others displayed for sale at a street souvenir shop in St.Petersburg, Russia, Sunday, Jan. 17, 2021. Top Kremlin critic Alexei Navalny says he will fly home to Russia on Sunday, Jan. 17, 2021 despite the Russian prison service's intention to put him behind bars for allegedly breaching the terms of his suspended sentence and probation. (AP Photo/Dmitri Lovetsky)

Face masks depicting Russian President Vladimir Putin, right, and Russian opposition leader Alexei Navalny, left of Putin, among others displayed for sale at a street souvenir shop in St.Petersburg, Russia, Sunday, Jan. 17, 2021. Top Kremlin critic Alexei Navalny says he will fly home to Russia on Sunday, Jan. 17, 2021, despite the Russian prison service's intention to put him behind bars for allegedly breaching the terms of his suspended sentence and probation. (AP Photo/Dmitri Lovetsky)

Nawalny supporters give interviews to the media outside of the Terminal 5 of the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Michael Sohn)

Navalny supporters hold a poster reading 'The time of dictators has come to the end. Putin is afraid of Navalny', outside of the Terminal 5 of the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

A Russian Pobeda airline passenger plane waits for its flight to Moscow at the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Michael Sohn)

A Russian Pobeda airline passenger plane waits for its flight to Moscow at the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Michael Sohn)

Boeing 737-800 of Pobeda Russian air company on which Alexei Navalny is expected to fly to Moscow, as it arrives to the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Police patrol the arrivals hall prior to Alexei Navalny's arrival, in Vnukovo airport outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Alexander Zemlianichenko)

A security stands guard in the arrivals hall prior to Alexei Navalny's arrival, in Vnukovo airport, outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Alexander Zemlianichenko)

Police buses parked, prior to Alexei Navalny's arrival, at the Vnukovo airport, outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Dmitry Serebryakov)

Russian Rosguardia (National Guard) and police buses stand prior to Alexei Navalny's arrival, at the Vnukovo airport, outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Dmitry Serebryakov)

APTOPIX Alexei Navalny is surrounded by journalists inside the plane prior to his flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife, Yulia sit in the plane prior to their flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife Yulia sit in the plane prior to flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny is surrounded by journalists inside the plane prior to his flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Police patrol the arrivals hall prior to Alexei Navalny's arrival, in Vnukovo airport outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny plans to fly home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Alexander Zemlianichenko)

APTOPIX Alexei Navalny and his wife Yulia board the plane prior to flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife Yulia sit in the plane prior to flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife Yulia sit in the plane prior to their flight to Moscow in the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny, right, and his wife Yulia sit in the plane during the flight from Berlin to Moscow , Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife Yulia sit in the plane prior to flying to Moscow, at the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny sits on the plane prior to a flight to Moscow, at the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny and his wife Yulia sit on the plane on a flight to Moscow, at the Airport Berlin Brandenburg (BER) in Schoenefeld, near Berlin, Germany, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny flew home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

Alexei Navalny, centre, and his wife Yulia travel an airport bus as they arrived to airport Sheremetyevo, outside Moscow, Russia, Sunday, Jan. 17, 2021. Leading Kremlin critic Alexei Navalny arrived home to Russia on Sunday after recovering in Germany from his poisoning in August with a nerve agent. (AP Photo/Mstyslav Chernov)

A supporter waits with a banner reading 'Good luck Alexey' outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader and anti-corruption campaigner Alexei Navalny. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

Journalists wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader and anti-corruption campaigner Alexei Navalny for Moscow. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

Travellers queue to check-in for a flight with Russian airline Pobeda for Moscow at Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader and anti-corruption campaigner Alexei Navalny for Moscow. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

Travellers queue to check-in for a flight with Russian airline Pobeda for Moscow at Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader and anti-corruption campaigner Alexei Navalny for Moscow. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

Policewomen patrol at Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader and anti-corruption campaigner Alexei Navalny for Moscow. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

A Pobeda airlines plane, which Russian opposition leader Alexei Navalny is to take for Moscow, arrives at Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

A Pobeda airlines plane, which Russian opposition leader Alexei Navalny is to take for Moscow, arrives at Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Police vehicles are seen next to the Pobeda airline plane, which Russian opposition leader Alexei Navalny is to take for Moscow, at Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

The Pobeda airline plane, which Russian opposition leader Alexei Navalny is to take for Moscow, is pictured at Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Odd ANDERSEN / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia sit in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny sits in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny sits in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny walks to take his seat in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

TOPSHOT Russian opposition leader Alexei Navalny and his wife Yulia sit in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

TOPSHOT Russian opposition leader Alexei Navalny walks to take his seat in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia walk to take their seats in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny sits in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny sits in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

TOPSHOT Russian opposition leader Alexei Navalny gestures sitting next to his wife Yulia in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia adjust face masks as they sit in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia sit in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen inside a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

A view of the arrivals hall at Moscow's Vnukovo airport where Russian opposition leader Alexei Navalny is expected to arrive on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Alexander NEMENOV / AFP)

Police and the Russian National Guard (Rosgvardia) vehicles are seen parked outside Moscow's Vnukovo airport where Russian opposition leader Alexei Navalny is expected to arrive on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by NATALIA KOLESNIKOVA / AFP)

Police with dogs patrol at Moscow's Vnukovo airport where Russian opposition leader Alexei Navalny is expected to arrive on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Alexander NEMENOV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane heading from Berlin to Moscow on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia are seen in a Pobeda plane heading from Berlin to Moscow on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia are seen in a Pobeda plane heading from Berlin to Moscow on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

TOPSHOT Russian opposition leader Alexei Navalny and his wife Yulia are seen in a Pobeda plane heading from Berlin to Moscow on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Supporters of opposition leader Alexai Navalny gather outside a terminal of Moscow's Vnukovo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by NATALIA KOLESNIKOVA / AFP)

Police officers detain a man at Moscow's Vnukovo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by NATALIA KOLESNIKOVA / AFP)

Russian opposition leader Alexei Navalny rides on a bus from a plane to a terminal of Moscow's Sheremetyevo airport on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia ride on a bus from a plane to a terminal of Moscow's Sheremetyevo airport on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny and his wife Yulia are seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021. - A flight carrying Kremlin critic Alexei Navalny back to Russia has landed in Moscow after it was diverted from a different airport where his supporters and media had gathered, AFP journalists on the plane said. The 44-year-old opposition figure risks imminent arrest. Russian police on Sunday already detained four of his top allies who had gathered at Vnukovo airport in Moscow, where he had been due to land, before the flight was diverted to Sheremetyevo. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny rides on a bus from a plane to a terminal of Moscow's Sheremetyevo airport on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

Russian opposition leader Alexei Navalny rides on a bus from a plane to a terminal of Moscow's Sheremetyevo airport on January 17, 2021. - Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. (Photo by Kirill KUDRYAVTSEV / AFP)

BERLIN, GERMANY - JANUARY 17: (----EDITORIAL USE ONLY ??" MANDATORY CREDIT - "ALEXEI NAVALNY'S INSTAGRAM ACCOUNT / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) A screen grab of Alexei and Yulia Navalnaya taken from a video posted on the Instagram account @navalny shows Russian opposition Leader Alexei Navalny before his flight at the Berlin Brandenburg International Airport BER in Berlin, Germany on January 17, 2021. Russian opposition leader Alexei Navalny plans to return to Russia on a scheduled flight to Moscow later in the afternoon on 17 January. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Alexei Navalny's Instagram Account / Handout / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: (----EDITORIAL USE ONLY ??" MANDATORY CREDIT - "ALEXEI NAVALNY'S INSTAGRAM ACCOUNT / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) A screen grab of Alexei and Yulia Navalnaya taken from a video posted on the Instagram account @navalny shows Russian opposition Leader Alexei Navalny before his flight at the Berlin Brandenburg International Airport BER in Berlin, Germany on January 17, 2021. Russian opposition leader Alexei Navalny plans to return to Russia on a scheduled flight to Moscow later in the afternoon on 17 January. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Alexei Navalny's Instagram Account / Handout / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: (----EDITORIAL USE ONLY ??" MANDATORY CREDIT - "ALEXEI NAVALNY'S INSTAGRAM ACCOUNT / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) A screen grab of Alexei and Yulia Navalnaya taken from a video posted on the Instagram account @navalny shows Russian opposition Leader Alexei Navalny before his flight at the Berlin Brandenburg International Airport BER in Berlin, Germany on January 17, 2021. Russian opposition leader Alexei Navalny plans to return to Russia on a scheduled flight to Moscow later in the afternoon on 17 January. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Alexei Navalny's Instagram Account / Handout / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: (----EDITORIAL USE ONLY ??" MANDATORY CREDIT - "ALEXEI NAVALNY'S INSTAGRAM ACCOUNT / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) A screen grab of Alexei and Yulia Navalnaya taken from a video posted on the Instagram account @navalny shows Russian opposition Leader Alexei Navalny before his flight at the Berlin Brandenburg International Airport BER in Berlin, Germany on January 17, 2021. Russian opposition leader Alexei Navalny plans to return to Russia on a scheduled flight to Moscow later in the afternoon on 17 January. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Alexei Navalny's Instagram Account / Handout / Anadolu Agency/ABACAPRESS.COM

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (green jacket) and his wife Yulia, who want to return to Moscow on a plane of the airline "Pobeda", get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

dpatop - 17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (2nd from right) and his wife Yulia board a plane of the airline "Pobeda" to fly to Moscow. Navalny stayed in Germany for almost five months for treatment after his poisoning. He now plans to continue his political fight in Russia. Repeat as edited version with tighter cropping. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Opponents of the Kremlin Alexey Navalny and his wife Yulia who want to return to Moscow on a plane of airline "Pobeda" get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (green jacket) and his wife Yulia, who want to return to Moscow on a plane of the airline "Pobeda", get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (green jacket) and his wife Yulia, who want to return to Moscow on a plane of the airline "Pobeda", get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: The Kremlin opponent Alexei Navalny (green jacket) and his wife Yulia want to fly back to Moscow on a plane of the airline "Pobeda". Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: The plane of the airline "Pobeda" in which Kremlin opponent Navalny and his wife want to fly back to Moscow arrives at the airport. Navalny stayed in Germany for almost five months for treatment following his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Opponents of the Kremlin Alexey Navalny and his wife Yulia who want to return to Moscow on a plane of airline "Pobeda" get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Schoenefeld: Russian opposition ledaer Alexei Navalny (second from right) boards a Pobeda airline plane bound for Moscow on Sunday. The Kremlin critic is flying home after spending five months in Germany, where he received emergency medical treatment following his poisoning with the nerve agent Novichok. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Opponents of the Kremlin Alexey Navalny and his wife Yulia who want to return to Moscow on a plane of airline "Pobeda" get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: A police car waits outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: Journalists and supporters of Russian opposition leader Alexey Navalny wait outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

BERLIN, GERMANY - JANUARY 17: A police car waits outside Terminal 5 of Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021, before the planned departure of Russian opposition leader Alexei Navalny for Moscow. Chief Kremlin critic Alexei Navalny returns to Russia from Germany on January 17, facing imminent arrest after authorities warned they would detain him. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Abdulhamid Hosbas / Anadolu Agency/ABACAPRESS.COM

17 January 2021, Brandenburg, Sch?nefeld: The plane of the airline "Pobeda" in which Kremlin opponent Navalny and his wife want to fly back to Moscow arrives at the airport. Navalny stayed in Germany for almost five months for treatment following his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (green jacket) and his wife Yulia, who want to return to Moscow on a plane of the airline "Pobeda", get on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny (2nd from right) and his wife Yulia board a plane of the airline "Pobeda" to fly to Moscow. Navalny stayed in Germany for almost five months for treatment after his poisoning. He now plans to continue his political fight in Russia. Repeat as edited version with tighter cropping. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: The plane of the airline "Pobeda" with Kremlin opponent Navalny and his wife takes off for Moscow. Navalny stayed in Germany for almost five months for treatment following his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: The plane of the airline "Pobeda" with Kremlin opponent Navalny and his wife takes off for Moscow. Navalny stayed in Germany for almost five months for treatment following his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Kremlin opponent Alexei Navalny and his wife Yulia, who want to fly back to Moscow on a plane of the airline "Pobeda", get on the plane. Photo: Michael Kappeler/dpa

BERLIN, GERMANY - JANUARY 17: (----EDITORIAL USE ONLY ??" MANDATORY CREDIT - "ALEXEI NAVALNY'S INSTAGRAM ACCOUNT / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) A screen grab of Alexei and Yulia Navalnaya taken from a video posted on the Instagram account @navalny shows Russian opposition Leader Alexei Navalny before his flight at the Berlin Brandenburg International Airport BER in Berlin, Germany on January 17, 2021. Russian opposition leader Alexei Navalny plans to return to Russia on a scheduled flight to Moscow later in the afternoon on 17 January. The 44-year-old opposition leader is flying back to Moscow after spending several months in Germany recovering from a poisoning attack that he said was carried out on the orders of President Vladimir Putin. Alexei Navalny's Instagram Account / Handout / Anadolu Agency/ABACAPRESS.COM

17 January 2021, Brandenburg, Sch?nefeld: RECROP - Kremlin opponent Alexei Navalny (l), who is about to fly back to Moscow with his wife on a plane of the airline "Pobeda", gets on the plane. Navalny stayed in Germany for almost five months for treatment after his poisoning. The 44-year-old is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: CORRECTS NAME OF PHOTOGRAPHER - A supporter of the Kremlin opponent Navalny stands at the airport BER. Here the departure of Nawalny with a plane of the airline "Pobeda" back to Moscow is expected. Navalny stayed in Germany for almost five months for treatment after his poisoning. He is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Kay Nietfeld/dpa

17 January 2021, Brandenburg, Sch?nefeld: A supporter of the Kremlin opponent Navalny stands at the airport BER. Here the departure of Nawalny with a plane of the airline "Pobeda" back to Moscow is expected. Navalny stayed in Germany for almost five months for treatment after his poisoning. He is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Journalists wait outside terminal five of Berlin-Brandenburg airport for Kremlin opponent Alexei Navalny and his wife Yulia, who want to fly back to Moscow on a plane operated by the airline "Pobeda". Navalny stayed in Germany for almost five months for treatment after his poisoning. He is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Journalists wait outside terminal five of Berlin-Brandenburg airport for Kremlin opponent Alexei Navalny and his wife Yulia, who want to fly back to Moscow on a plane operated by the airline "Pobeda". Navalny stayed in Germany for almost five months for treatment after his poisoning. He is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa

17 January 2021, Brandenburg, Sch?nefeld: Journalists wait outside terminal five of Berlin-Brandenburg airport for Kremlin opponent Alexei Navalny and his wife Yulia, who want to fly back to Moscow on a plane operated by the airline "Pobeda". Navalny stayed in Germany for almost five months for treatment after his poisoning. He is considered the most prominent opponent of Russian President Putin. Navalny wants to continue his political fight against Putin. Photo: Michael Kappeler/dpa