At least 66 people were killed after a pipeline ruptured by suspected fuel thieves exploded in Mexico, authorities said on Saturday, as President Andres Manuel Lopez Obrador defended the army despite its failure to clear the site before the blast. Dozens of burned bodies lay in the charred field where the blast occurred on Friday evening by the town of Tlahuelilpan in the central state of Hidalgo in what was one of the worst incidents to hit Mexico's troubled oil infrastructure in years. Forensic experts inspected and photographed the remains while soldiers and other military personnel guarded the cordoned-off area that was littered with half-burned shoes, clothes and containers used by people to collect fuel.