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The teenagers – alleged to be Muslim by the video uploader – descended on the bus and set the whole street alight.

The gang threatened to kill the driver before kicking five other passengers off the vehicle.

But remarkably no-one was injured during the chaos.

(Image: LIVELEAK) (Image: LIVELEAK)

The attack – which took place last Wednesday but has only recently emerged after the footage was shared online – happened in the city’s notorious Saint Denis suburb.

The area has been a hotbed for Islamic terrorism over the last 18 months – and was the scene of the coordinated Paris terror attacks in November.

Firefighters had to deploy three water cannons to quell the flames and the metal hull of the bus split in two.

Local mayor Didier Paillard said: "This act of premeditated vandalism could have been tragic.

"It follows an attempted homicide on a worker by a Molotov cocktail on July 22 and buildings being looted."

An investigation into the attack is currently under way.