A man who rammed a car into a police van in Paris stored a cache of weapons at his home and held a gun permit despite being on a secret service list of people linked to radical Islam, police sources and French officials said on Tuesday.
A source close to the investigation said the 31-year-old assailant had sworn allegiance to Islamic State in a letter to his brother-in-law.
Investigators were compiling an inventory of the arms and equipment found in his home. The man, who died in the attack, was also carrying in his car an assault rifle, two pistols, ammunition and two large gas canisters when he rammed a police convoy on Monday.