Emergency services at the scene after a knife attack near the former offices of satirical newspaper Charlie Hebdo, Friday Sept. 25, 2020 in Paris. Paris police say they have arrested a man suspected of a knife attack that wounded at least two people near the former offices of satirical newspaper Charlie Hebdo. Police initially thought there were two attackers but now say there was only one. (AP Photo/Thibault Camus)

French firefighters load an injured person into a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters move an injured person to a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters push a gurney carrying an injured person near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a machete in Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters move an injured person to a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters carrying an injured person near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a machete in Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters wheel on a gurney an injured person to a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters move an injured person into an ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

A French polive officer stands guard as firefighters lift an injured person into an ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French police special forces (GSO) kit-up near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in Paris on September 25, 2020. - The threats has coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters load an injured person into a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters load one of the three people injured into a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French soliders rush to the scene after three people were injured near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - The threats coincide with the trial of 14 suspected accomplices of the perpetrators of the massacres at Charlie Hebdo and a Jewish supermarket that left a total of 17 dead. (Photo by Alain JOCARD / AFP)

French firefighters move an injured person into a waiting ambulance near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police officers rush to the scene after people were injured near the former offices of the French satirical magazine Charlie Hebdo following an alleged attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police secure the area after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police secure the area after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police officers arrive to secure the area after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police of the Moyens Aeriens unit manipulate a drone after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

An armed French soldier (backC) stands guards past policemen as he secures the area after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

Firefighters chat near the area after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

Paris prosecutor Remy Heitz (C), surrounded by police, visits the scene after several people were injured near the former offices of the French satirical magazine Charlie Hebdo following an attack by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police surround Paris prosecutor Remy Heitz (C-back), at the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. Two of the victims were in a critical condition, the Paris police department said, adding two suspects were on the run. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police and forensic officers inspect the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police and forensic officers inspect the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police and forensic officers inspect the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - A man armed with a knife seriously wounded two people on September 25, 2020, in a suspected terror attack outside the former offices of French satirical weekly Charlie Hebdo in Paris, three weeks into the trial of men accused of being accomplices in the 2015 massacre of the newspaper's staff. Charlie Hebdo had angered many Muslims around the world by publishing cartoons of the Prophet Mohammed, and in a defiant gesture ahead of the trial this month, it reprinted the caricatures on its front cover. (Photo by Alain JOCARD / AFP)

French police and forensic officers inspect the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police and forensic officers inspect the scene of an attack after several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by Alain JOCARD / AFP)

French police are given instructions at the scene of an attack in which several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

French firefighters gather at the scene of an attack in which several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

A French Gendarme blocks the road leading to the scene of an attack in which several people were injured near the former offices of the French satirical magazine Charlie Hebdo by a man wielding a knife in the capital Paris on September 25, 2020. - Four people were injured, two seriously, in a knife attack in Paris on September 25, 2020, near the former offices of French satirical magazine Charlie Hebdo, a source close to the investigation told AFP. The stabbing came as a trial was underway in the capital for alleged accomplices of the authors of the January 2015 attack on the Charlie Hebdo weekly that claimed 12 lives. (Photo by GEOFFROY VAN DER HASSELT / AFP)

(FILES) A file photo taken on August 31, 2020 shows woman walking past a painting by French street artist and painter Christian Guemy, known as C215, in tribute to members of Charlie Hebdo newspaper who were killed by jihadist gunmen in Paris on January 2015. - Officers arrested the suspected attacker after four people were injured in a knife assault in Paris on September 25, 2020, near the former offices of satirical weekly Charlie Hebdo, French police said. The man was arrested near the sprawling Place de la Bastille, police said, adding he was the only suspect in an attack that came as a trial is under way for alleged accomplices in the January 2015 attack on Charlie Hebdo that killed 12 people. (Photo by THOMAS COEX / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION