Awoman has been decapitated during a knife attack near the Notre Dame Basilica church in the French city of Nice, according to French media citing police sources.
Reports say three people are dead and several others are injured.
The assailant was arrested after the Thursday morning attack and taken to a nearby hospital after being injured during his arrest, a police offical said. He was believed to be acting alone, the official said.
One of the victims - a woman - was beheaded, according to a police source.
The attack began around 9am, according to local reports, before police swarmed the area and arrested the attacker.