Investigators in London are trying to figure out why part of the ceiling of a theater collapsed mid-performance Thursday, injuring at least 88 people at a nearly sold-out show.
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![A woman walks, bandaged and wearing a blanket given by emergency services, following the partial collapse of the ceiling at the Apollo Theatre during a performance at the height of the Christmas season, Shaftesbury Avenue, central London, Dec. 19, 2013.](https://gdb.voanews.com/84c5a069-87f0-4b3e-8f57-acf9114469f9_w1024_q10_s.jpg)
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A woman walks, bandaged and wearing a blanket given by emergency services, following the partial collapse of the ceiling at the Apollo Theatre during a performance at the height of the Christmas season, Shaftesbury Avenue, central London, Dec. 19, 2013.
![Emergency services look at the roof of the Apollo Theatre after part of the ceiling collapsed, Shaftesbury Avenue, London, Dec. 19, 2013.](https://gdb.voanews.com/a6e6c795-5a98-4e07-bc89-2853d28c7e2c_w1024_q10_s.jpg)
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Emergency services look at the roof of the Apollo Theatre after part of the ceiling collapsed, Shaftesbury Avenue, London, Dec. 19, 2013.
![A bandaged man comforts a woman after part of the ceiling collapsed at the Apollo Theatre, Shaftesbury Avenue, London, Dec. 19, 2013.](https://gdb.voanews.com/6b46f178-653d-4052-98d4-51165b880a31_w1024_q10_s.jpg)
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A bandaged man comforts a woman after part of the ceiling collapsed at the Apollo Theatre, Shaftesbury Avenue, London, Dec. 19, 2013.
![A man wraps himself in an emergency foil blanket provided by rescue services after part of the ceiling collapsed during a performance at the Apollo Theatre, Shaftesbury Avenue, London, Dec. 19, 2013.](https://gdb.voanews.com/f18056cb-79a3-40a5-8527-64b8a734283e_w1024_q10_s.jpg)
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A man wraps himself in an emergency foil blanket provided by rescue services after part of the ceiling collapsed during a performance at the Apollo Theatre, Shaftesbury Avenue, London, Dec. 19, 2013.