Mexico blast investigated as accident Associated Press Copyright 2013 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Published 7:50 pm, Friday, February 1, 2013 A blast that collapsed the lower floors of a building in the headquarters of Mexico's state-owned oil company, crushing at least 33 people beneath tons of rubble and injuring 121, is being looked at as an accident, although all lines of investigation remain open, the head of Petroleos Mexicanos said Friday. [...] virtually all ... Read More