A truck roof crowded with people collapsed at the Scarlet Sails fireworks display in Russia on Sunday.

A video filmed by an eyewitness shows a large group of people celebrating on the top of the truck in the middle of a crowd, and the roof collapsing.

The Scarlet Sails fireworks display is the climactic event of the annual White Nights festival.

The tradition celebrates the end of the school year with a stunning fireworks display as a ship with scarlet sails makes its way slowly along the English and Admiralty Embankments to the Winter Palace.