Paris police shot dead on Thursday a man wielding a knife after he tried to enter a police station shouting "Allahu Akbar" (God is Great) and wearing what turned out to be a fake suicide belt.
The incident took place exactly one year after deadly Islamist militant attacks on the Charlie Hebdo satirical magazine in the French capital and also just minutes after President Francois Hollande had given a speech in an another part of Paris to mark the anniversary.
"The man may have been wearing something that could be a suicide belt," Interior Ministry spokesman Pierre-Henry Brandet told BFM TV. Brandet later confirmed to Reuters that the suicide belt was fake.
France has been on high alert ever since the shootings last January at the Charlie Hebdo office and at a Jewish supermarket in which 17 people died over three days.
Security concerns were further heightened in November, when 130 people were killed in the capital in coordinated shootings and suicide bombings that targeted a music hall, bars and restaurants and a soccer stadium.
Islamic State, the militant group that controls swathes of Iraq and Syria, claimed responsibility for the Nov. 13 attacks. Several of the militants involved in those attacks were, like last January's killers, French-born.
In Thursday's incident, the man tried to force his way into the police station in the 18th district in northern Paris, an area that Islamic State said it had been planning to hit as part of the November attacks.
"According to our colleagues, he wanted to blow himself up," an official at the Alternative Police union said. "He shouted Allahu Akbar and had wires protruding from his clothes. That's why the police officer opened fire."
Officials said bomb disposal experts were on site.
The man was carrying a mobile phone and a sheet of paper showing the Islamic State flag and claims of responsibility written in Arabic, the Paris prosecutor said in a statement.