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.
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