BBC : A deadly blast at the headquarters of the Mexican state oil company Pemex was caused by a build-up of gas, the attorney general has said.
Jesus Murillo Karam said no traces of explosives were found at the site in Mexico City.
BBC : A deadly blast at the headquarters of the Mexican state oil company Pemex was caused by a build-up of gas, the attorney general has said.
Jesus Murillo Karam said no traces of explosives were found at the site in Mexico City.