Officials are still trying to determine what caused a massive explosion to occur Friday at Mexico's state oil company headquarters, Reuters reports.
While experts speculate that the blast may have been caused by a gas leak or a boiler exploding, some believe the incident was the result of a bomb. Experts worked alongside emergency personnel to rescue survivors, and dig through the rubble in an attempt to determine the cause of the blast. The explosion took place at the Pemex office complex, which houses one of Mexico's tallest skyscrapers, CNN said.
Thirty three people were confirmed dead, and 121 people were injured in Friday's blast. The blast marks yet another issue for the state-run Pemex, whose reputation has been tarnished over the years due to security problems, oil theft, and multiple accidents. The explosion also serves as a test for newly-instated President Enrique Pena Nieto, who said overhauling the troubled company would be one of his biggest priorities upon taking office.