Soldiers remove debris after an explosion at the state-owned oil company PEMEX 

Soldiers remove debris after an explosion at the state-owned oil company PEMEX office complex in Mexico City, Sunday Feb. 3, 2013. Mexico's state-owned oil company says rescuers have found another body amid the rubble of a headquarters building damaged by a still-unexplained blast. The find raises the death toll of Thursday's explosion to about 34 people. (AP Photo/Marco Ugarte)
Associated Press
Soldiers remove debris after an explosion at the state-owned oil company PEMEX office complex in Mexico City, Sunday Feb. 3, 2013. Mexico's state-owned oil company says rescuers have found another body amid the rubble of a headquarters building damaged by a still-unexplained blast. The find raises the death toll of Thursday's explosion to about 34 people. (AP Photo/Marco Ugarte)
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