Luis Danilo Murcia, commander of the Quiron Task Force in Arauca, said the clash between the armed forces and the FARC's Alonso Lopez 10th Front started Saturday night and continued on Sunday.
According to the commander, the 10th Front was responsible for the killing of 14 soldiers in August last year in a rural area of the municipality of Tame, Arauca.
Murcia was also quoted as saying that he expected that more rebels would be killed as a result of the heavy clashes.
On Dec.10, the Colombian army killed the FARC leader "Jainover" and captured four guerrilla rebels.