This image taken from television shows emergency services attending an incident at the Apollo Theatre, illuminated at rear right, in London's Shaftesbury Avenue, Thursday evening, Dec. 19, 2013, during a performance at the height of the Christmas season, with police saying there were "a number" of casualties. It wasn't immediately clear if the roof, ceiling or balcony collapsed during a performance. Police said they "are aware of a number of casualties," but had no further details. (AP Photo/Sky News) UNITED KINGDOM OUT, TV OUT ( Britain Theater Collapse )