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Photo by: Joel Ryan

A woman lies on a stretcher surrounded by rescue workers, awaiting evacuation following an incident during a performance at the Apollo Theatre, in London's Shaftesbury Avenue, Thursday evening, Dec. 19, 2013, with police saying there were "a number" of casualties. It wasn't immediately clear which part of the building had collapsed. The London Fire Brigade said the theatre was almost full, with around 700 people watching the performance. A spokesman added: "It's thought between 20 and 40 people were injured." (AP Photo by Joel Ryan, Invision)

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