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Mexico says Pemex blast caused by gas build-up, not explosives


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A rescue worker from the Mexican rescue team known as ''Topos'' waves to the media after leaving the headquarters of state-owned oil giant Pemex, following a deadly blast, in Mexico City February 4, 2013. Mexican rescue workers found three more bodies over the weekend amid the rubble of the deadly blast that tore through state oil firm Pemex's main office complex, the government said, as search efforts appeared to near a close.The death toll from Thursday's explosion stands at 36, Pemex said via Twitter. Rescue workers had been digging through the last sections of the building's basement and could soon call off their search. One person was reported still missing. REUTERS/Henry Romero