This picture taken on 5 February 2018, shows a general view of the exterior of Vendin-le-Vieil penitentiary, in Vendin-le-Vieil, northern France. The investigation into the illegal possession of a USB key by Salah Abdeslam, the last surviving member of the commandos of the November 13, 2015 attacks, has been expanded, and three people are now in custody, the National Anti-Terrorist Prosecutor's Office (PNAT) indicated on November 8, 2025. PHILIPPE HUGUEN / AFP

French magistrates were on Monday, November 10, investigating the ex-girlfriend of a man jailed for the deadly November 13, 2015 Paris attacks over an alleged jihadist plot, prosecutors said. But Salah Abdeslam himself was not involved in any plot, the national anti-terror prosecutor's office (PNAT) said.

The probe comes as France prepares to mark the 10th anniversary of the Islamic State group attacks in and around Paris that killed 130 people and wounded hundreds more. Abdeslam was sentenced to life in jail in 2022, after nine fellow attackers blew themselves up or were killed by police.

Magistrates opened a probe on Monday after finding several discussions or internet searches linked to a "plot for violent action" on electronic devices found at the home of Maeva B, the PNAT said. The woman, who has been in custody since Tuesday, exhibited "clear radicalization and a fascination for jihad," the PNAT said. Local broadcaster RTL reported she was 27 years old.