BOGOTA (AFP) - Nine Colombian soldiers were killed Friday in an attack near the border with Ecuador that the military has blamed on leftist guerrillas. Rebels with the Revolutionary Armed Forces of Colombia (FARC) attacked a patrol of soldiers with home-made explosives at dawn near the south-western port of Tumaco, said General Alejandro Navas, the head of Colombia's armed forces. "Reinforcements are arriving. We have begun to chase these bandits, who are fleeing," Navas said. The southwestern Narino region bordering Ecuador is one of the most violent areas in Colombia. Leftist guerrillas, criminal gangs and former right-wing paramilitaries are all active in the region.