Explosion shakes Prague

Associated Press
Paramedics help injured people after 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)

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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.