The mastermind behind the attacks in Paris last week has been identified in CCTV footage, jumping over Metro station automatic barriers while his comrades slaughtered innocent people across the city.
Abdelhamid Abaaoud, 27, passed through ticket barriers on Line 9 of the underground train network on Friday, while the attacks that killed 129 people were underway.
Abaaoud can be seen at the Croix de Chavaux Metro station in the Paris suburb of Montreuil, not far from where one of the cars used in the attacks was found, a police source said.
He was spotted on the tape at around 10pm after shootings at several cafes and suicide bombings near a packed football stadium had taken place, but while a massacre was still underway at Bataclan concert hall.
After the terror he went into hiding, but was killed by a police sniper during a gun battle on Thursday. Before the attacks, European governments thought that Abaaoud was still in Syria.
Abaaoud is believed to have recruited similar young men from immigrant families in his native Brussels district of Molenbeek and elsewhere in Belgium and France.
Abaaoud was one of Islamic State's highest-profile European recruits, appearing in the group's online English-language magazine Dabiq, where he boasted of crossing European borders to stage attacks.
The group, which controls swathes of Iraq and Syria, has attracted thousands of young Europeans, and Abaaoud was seen as a leading figure in luring others to join, particularly from his home country Belgium.