The gunman who killed a police officer and wounded two others in the heart of Paris before being killed himself was French and had a long criminal record, NBC News reported.
Karim Cheurfi, 39, was a Paris resident, according to a representative of the Paris prosecutor's office. The city's prosecutor said he was carrying a note defending ISIS, The Associated Press reported.
Interior Ministry spokesman Pierre Henry Brandet earlier told radio station France Info that officials found a shotgun and knives in the suspect's car, and three people from his family were being questioned.
Cheurfi was fatally shot trying to flee the scene of the shooting on the Champs-Elysees Thursday, in which what French President Francois Hollande has called a terrorist attack.