Based on an analysis of the killer’s cellphone as well as social media postings, “his radicalisation appears little in doubt,” Jean-Francois Ricard said at a press conference.

The 36-year-old attacker, identified as Jamel Gorchene, stabbed a woman who worked at the police station in Rambouillet, a suburb southwest of Paris, on Friday April 23rd, as she was returning from a break.

Racing into the building’s secure entry hall, he grabbed the victim from behind and stabbed her in the stomach and throat while yelling Allahu Akbar” (God is Greatest), Ricard said.

An officer in the building shot Gorchene after he refused an order to drop the knife, which had a 22-centimetre (nine inch) blade.

Investigators discovered that he watched an Islamist jihad propaganda video on his phone shortly before the attack, and a Koran was found on his scooter afterwards, Ricard said.

Read more: The Local (France)