Smoke rises from the scene of an explosion at a gas pipeline belonging to state oil monopoly Pemex near Maltrata in the eastern Mexican state of Veracruz September 10, 2007. Six explosions caused by sabotage hit pipelines in Mexico on Monday, disrupting oil and natural gas supplies and forcing thousands from their homes, following similar attacks in July by leftist rebels. REUTERS/Imelda Medina (MEXICO)