BBCAn "unprecedented" manhunt is taking place in northern France for a prisoner who escaped during a deadly ambush.
Mohamed Amra, known as "The Fly", was being taken back to jail from a court in Normandy on Tuesday when a car rammed his prison van at a toll booth.
Armed men then opened fire on the vehicle, killing two officers and seriously injuring three others.
The shooting marks the country's first fatal attack on prison staff for more than 30 years.
"All means are being used to find these criminals," French Interior Minister Gerald Darmanin said.
Mr Darmanin told French media on Wednesday the attack was an act of "cold-blooded barbarity" and that around 450 gendarmes and police officers had been mobilised in the Eure department of Normandy in an "unprecedented" search.
President Emmanuel Macron has told France that "everything is being done to find the perpetrators".
