Colombian officials say an aerial bombardment has killed 18 rebels from the Revolutionary Armed Forces of Colombia, or FARC.
Authorities say the air attack took place early Friday in the province of Meta.
Officials say ground troops followed the bombing by storming a rebel base and capturing at least 13 fighters in the area.
Officials say Meta is a lucrative cocaine-producing region for the rebels.
Late Thursday, officials say rebels killed a soldier and a 14-year-old civilian in an attack several hundred kilometers southwest of Bogota.
The FARC has been fighting the Colombian government for four-and-a-half decades and has been designated as a terrorist organization by Colombia, the United States and the European Union.