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Injured people leave a scene of an explosion in downtown Prague, Czech Republic, Monday, April 29, 2013. Police said a powerful explosion has damaged a building in the center of the Czech capital and they believe some people are buried in the rubble. (AP Photo/Petr David Josek)

Explosion shakes Prague

April 29, 2013

An explosion in central Prague on April 29, probably caused by gas, injured as many as 40 people, officials said, and neighboring buildings - including the National Theatre - had to be evacuated.