According to reports, the incident took place at round 9 am inside the Notre-Dame basilica in the city centre.

One among the victims was beheaded, reports added.

The attacker was shot and later rushed to a hospital by police.

Nice Mayor Christian Estrosi told reporters that the attackers shouted 'Allahu Akbar' multiple times while he was being nabbed at the scene.

"We have two people killed inside the church … and a third person who was in a bar facing the church where she had taken refuge. Enough is enough … we have to remove this Islamo-fascism from our territory,” the Mayor said.

"Before it was a school professor, this time the Islamo-fascist barbarism chose to attack inside a church. Again, it is very symbolic," he added.  

The attack comes days after a history teacher Samuel Paty, 47, was beheaded for showing cartoons of Prophet Mohammad during a discussion on free speech.