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Rescue workers and firefighters carry an injured person after an explosion in a building at Mexico's state-owned oil company PEMEX complex, in Mexico City, Thursday Jan. 31, 2013. The explosion killed more than 10 people and injured some 80 as it heavily damaged three floors of the building. According to civil protection and local media some people remained trapped in the debris from the explosion, which occurred in the basement of an administrative building next to the iconic, 52-story tower of Petroleos Mexicanos, or PEMEX. (AP Photo/Eduardo Verdugo)

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Mexico City oil company explosion

February 1, 2013

The Mexican government said on Feb. 4 that a gas leak caused a blast that killed at least 37 people at the offices of state oil monopoly Pemex in Mexico City, raising fresh questions about the firm's safety record.