Article Photos: 33 die in Mexico oil company office building blast 2/10

A worker belonging to Mexico's state-owned oil company PEMEX keeps journalists away after an explosion at an adjacent building to the executive tower of PEMEX in Mexico City, Thursday Jan. 31, 2013. An explosion at the main headquarters of Mexico's state-owned oil company in the capital Thursday left at least several workers injured, blew out windows and damaged the building, the company said. (AP Photo/Eduardo Verdugo)