Mexico Pemex Explosion Kills at Least 25

Firefighters belonging to the Tacubaya sector 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, Thursday Jan. 31, 2013. A large explosion occurred in the lower floors of the building and dozens have been reported injured so far. (AP Photo/Guillermo Gutierrez) (AP2013)

An injured person is carried into an ambulance after an explosion at an adjacent building to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City, Thursday Jan. 31, 2013. An explosion at the main headquarters of Mexico's state-owned oil company in the capital killed more than 10 people and injured some 80 as it heavily damaged three floors of the building, sending hundreds into the streets and a large plume of smoke over the skyline. (AP Photo/Eduardo Verdugo) (AP2013)

Rescue workers carry an injured survivor 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) (AP2013)

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) (AP2013)

Firefighters belonging to the Tacubaya sector and emergency responders pull out a survivor after an explosion at an adjacent building to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City, Thursday Jan. 31, 2013. A large explosion occurred in the lower floors of the building and dozens have been reported injured so far. (AP Photo/Guillermo Gutierrez) (AP2013)

Firefighters belonging to the Tacubaya sector and workers dig for survivors after an explosion at a building adjacent to the executive tower of Mexico's state-owned oil company PEMEX, in Mexico City, Thursday Jan. 31, 2013. A large explosion occurred in the lower floors of the building and dozens have been reported injured so far. (AP Photo/Guillermo Gutierrez) (AP2013)

Rescue workers, firefighters and military search for survivors at the site of 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) (AP2013)