Gunmen on Tuesday attacked a prison van at a motorway toll in northern France, killing at least two prison officers and freeing a convict who had been jailed last week.
President Emmanuel Macron vowed that everything would be done to find those behind the attack as hundreds of members of the security forces were deployed for a manhunt to find the attackers and the inmate who were all still at large.
Two prison officers were killed in the attack and two others are receiving urgent medical care, Paris prosecutor Laure Beccuau said in a statement.
The incident took place late morning at a road toll in Incarville in the Eure region of northern France, a source close to the case added.