A man lays flowers at an Unknown Soldier Tomb to mark Victory Day in World War II, in Kyiv, Ukraine, Monday, May 9, 2022, as the Russian attack on Ukraine continues. (AP Photo/Efrem Lukatsky)

A woman lays flowers at the Unknown Soldier Tomb, protected by sandbags, on the occasion of the Victory Day in World War II, in Kyiv, Ukraine, Monday, May 9, 2022. (AP Photo/Efrem Lukatsky)

A Soviet army veteran lays flowers at a the Tomb of the Unknown Soldier to mark the Victory Day in World War II, in Kyiv, Ukraine, Monday, May 9, 2022.(AP Photo/Efrem Lukatsky)

A woman lays flowers at an Unknown Soldier Tomb to mark Victory Day in World War II in Kyiv, Ukraine, Monday, May 9, 2022, as the Russian attack on Ukraine continues. (AP Photo/Efrem Lukatsky)

A Ukrainian flag flutters near Independence Square in Ukraine's capital Kyiv on May 9, 2022, amid Russia's invasion of Ukraine. (Kyodo via AP Images) ==Kyodo

The Independence Monument is seen towering above a largely empty Maidan square in Kyiv on May 9th, 2022. - As troops poured into Moscow for the Victory Day celebrations, across the border in Ukrainian capital Kyiv the commemoration day was largely shunned as life slowly returned to normal weeks after fierce fighting raged in its suburbs against Russian forces. (Photo by Carlos REYES / AFP)

The Independence Monument is seen towering above a largely empty Maidan square in Kyiv on May 9th, 2022. - As troops poured into Moscow for the Victory Day celebrations, across the border in Ukrainian capital Kyiv the commemoration day was largely shunned as life slowly returned to normal weeks after fierce fighting raged in its suburbs against Russian forces. (Photo by Carlos REYES / AFP)

The Independence Monument is seen towering above a largely empty Maidan square in Kyiv on May 9th, 2022. - As troops poured into Moscow for the Victory Day celebrations, across the border in Ukrainian capital Kyiv the commemoration day was largely shunned as life slowly returned to normal weeks after fierce fighting raged in its suburbs against Russian forces. (Photo by Carlos REYES / AFP)

A woman lays flowers at the monument to Died Soviet Soldiers, in the WWII open air museum in Kyiv during the Victory Day on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A woman lays flowers at the monument to Died Soviet Soldiers, in the WWII open air museum in Kyiv during the Victory Day on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A woman lays flowers at the monument to Died Soviet Soldiers, in the WWII open air museum in Kyiv during the Victory Day on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A man lays flowers at the monument to Died Soviet Soldiers, in the WWII open air museum in Kyiv during the Victory Day on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian serviceman lays flowers at the monument to Unknown Soldier during the Victory Day in Kyiv on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian serviceman lays flowers at the monument to Unknown Soldier during the Victory Day in Kyiv on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian serviceman lays flowers at the monument to Unknown Soldier during the Victory Day in Kyiv on May 9, 2022. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian flag waves at the Monument of Motherland and open air museum of WWII in Kyiv on May 9, 2022, amid Russian invasion of Ukraine. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian flag waves at the Monument of Motherland and open air museum of WWII in Kyiv on May 9, 2022, amid Russian invasion of Ukraine. (Photo by Sergei SUPINSKY / AFP)

Ukrainian servicemen walk past the sandbagged monument to WWII hero Air Marshal of Soviet Army Ivan Kozhedub - highest scoring Soviet and Allied fighter pilot - in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

A pedestrian walks past the sandbagged monument to WWII hero Air Marshal of Soviet Army Ivan Kozhedub - highest scoring Soviet and Allied fighter pilot - in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

A woman speaks on her mobile phone at open air museum of WWII in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

A man walks with his son at open air museum of WWII in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

A woman holds flowers at open air museum of WWII in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

A man walks past a Russian missile at open air museum of WWII in Kyiv on May 9, 2022, during Victory Day the 77th anniversary of the defeat of Nazi Germany by the forces of the Soviet Union. (Photo by Sergei SUPINSKY / AFP)

The colours of the Ukrainian flag are projected onto the Motherland statue at the WWII open-air museum on the eve of victory day at dusk in Kyiv on May 8, 2022. (Photo by Genya SAVILOV / AFP)

The colours of the Ukrainian flag are projected onto the Motherland statue at the WWII open-air museum on the eve of victory day at dusk in Kyiv on May 8, 2022. (Photo by Genya SAVILOV / AFP)

A damaged bronze sculpture of a soldier kneeling to pay his last respect to fallen comrades in WWII is seen on the eve of victory day in Kyiv on May 8, 2022. - The Soviet era monument was damaged during the invasion of Ukraine by Russia. (Photo by Genya SAVILOV / AFP)

A damaged bronze sculpture of a soldier kneeling to pay his last respect to fallen comrades in WWII is seen on the eve of victory day in Kyiv on May 8, 2022. - The Soviet era monument was damaged during the invasion of Ukraine by Russia. (Photo by Genya SAVILOV / AFP)

The Independence Monument is seen towering above a largely empty Maidan square in Kyiv on May 9th, 2022. - As troops poured into Moscow for the Victory Day celebrations, across the border in Ukrainian capital Kyiv the commemoration day was largely shunned as life slowly returned to normal weeks after fierce fighting raged in its suburbs against Russian forces. (Photo by Carlos REYES / AFP)