London's Apollo theatre roof collapses
An investigation has started to find out why part of a theatre collapsed last night, hurting dozens of people.
A section of the roof at London's Apollo theatre in the West End fell down during the show.
Emergency services say 76 people were injured.
The theatre had been almost full with 720 people watching the performance.
London's emergency crews are being praised for their quick work, with many people saying they were on scene 'in minutes'.
The emergency response included 25 ambulance crews, an air ambulance rapid response team, eight fire engines and more than 50 firefighters.
The Apollo is a Grade II listed building, which was was built in 1901 and has 775 seats over four levels.