Part of Apollo Theatre roof collapses in London
19 December 2013 Last updated at 21:50 GMT
Part of a roof in the Apollo Theatre in central London has collapsed during a performance.
The theatre in Shaftesbury Avenue was packed for a performance of the Curious Incident Of The Dog in the Night-Time.
Simon Usborne, who was in the audience, said he heard cracking which sounded like "sudden structural failure".