(Reuters) – – Pumping of oil from one of Colombia’s ‎most important pipelines, the Bicentenario, was paralyzed after an attack by leftist rebels, its operator said on Saturday. The pipeline crosses areas where there is a strong presence of the two main rebel groups, the Revolutionary Armed Forces of Colombia, or FARC, and the National Liberation Army, or ELN. Colombia is the fourth-largest producer of oil in Latin America, but its output has been reduced by heavy attacks in recent months by the insurgent ‎groups. There were 259 attacks on oil installations in 2013, the highest number in a decade.