AP
A GGT (General Working Confederation) union flag hangs as penitentiary staff demonstrate outside the prison in Vendin le Vieil, northern France, Monday Jan.15, 2018. Penitentiary staff block several prisons in France after an attack by an inmate against several people at this high-security prison in northern France. (AP Photo/Michel Spingler)
- Michel Spingler
Riot police officers stand guard in front of the Fresnes prison during a demonstration by penitentiary staff, in Fresnes, outside Paris, Monday Jan.15, 2018. Penitentiary staff block several prisons in France after an attack by an inmate against several people at a high-security prison in northern France. (AP Photo/Thibault Camus)
- Thibault Camus
Penitentiary staff set up barricades outside the Fresnes prison during a demonstration, in Fresnes, outside Paris, Monday Jan.15, 2018. Penitentiary staff block several prisons in France after an attack by an inmate against several people at a high-security prison in northern France. (AP Photo/Thibault Camus)
- Thibault Camus
Penitentiary staff stand by a fire as they demonstrate outside the prison in Vendin le Vieil, northern France, Monday Jan.15, 2018. Penitentiary staff block several prisons in France Monday Jan. 15, 2018 after an attack by an inmate against several people at the high-security prison of Vendin le Vieil on Thursday Jan.11 2018 in northern France. (AP Photo/Michel Spingler)
- Michel Spingler
Penitentiary staff demonstrate outside the prison in Vendin le Vieil, northern France, Monday Jan.15, 2018. Penitentiary staff block several prisons in France after an attack by an inmate against several people at the high-security prison of Vendin le Vieil on Thursday Jan.11 2018 in northern France. (AP Photo/Michel Spingler)
- Michel Spingler