Mexican oil giant chief won't speculate on cause of blast that killed 33

A day after an explosion rocked its offices in Mexico City, Mexico's state-run oil giant Pemex says it's too early to speculate on the cause of the deadly blast. At least 33 people -- mostly women -- were killed in the explosion, Pemex chief Emilio Lozoya said at a news conference Friday. More than 100 were injured, including 52 who remain hospitalized. Lozoya was asked if he believed Pemex, the powerful but often criticized state oil monopoly, was the target of a bombing, but he declined to speculate. Experts from Mexico and abroad are investigating the scene to determine the cause, he said...more