Officials were struggling to determine the identity of the knife-wielding man who was shot dead outside a Paris police station a day after the foiled attack.
"We're faced with an isolated individual," Paris Prosecutor Francois Molins told France Inter radio on Friday.
The suspect was carrying a butcher's knife and shouted "Allahu akbar" - or "God is greatest" - before he was shot by police, according to a statement from the prosecutor's office on Thursday.
The incident, which came as France marked the one-year anniversary of the deadly Charlie Hebdo terror attacks , raised tensions in a country still reeling after Islamist extremists laid siege to Paris and killed 130 people across the city .