Media playback is unsupported on your device

Stage collapses at Ottawa Bluesfest festival

18 July 2011 Last updated at 16:31 BST

Severe storms caused a stage to collapse at the Ottawa Bluesfest on Sunday evening.

The band Cheap Trick were in the middle of their set when the thunderstorm caused part of the stage to collapse.

At least five people were injured, one of them seriously.