Firefighters and workers dig for survivors after an explosion at an adjacent building to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City
Firefighters and workers dig for survivors after an explosion at an adjacent building to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City AP
Firefighters and workers dig for survivors after an explosion at an adjacent building to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City AP

Doubts linger that natural gas caused fatal Mexico blast that killed 37

February 05, 2013 4:54 PM

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