Ten dissident members of Colombian former guerrilla group FARC were killed in a military operation on the border with Venezuela, the army said today.
"We will not lower our guard against these criminals," President Juan Manuel Santos wrote on Twitter.
The operation, which killed seven men and three women, was carried out in the municipality of Forful, in the South American country's department of Arauca, the army statement said.
The statement gave few details of the military action, but Defence Minister Luis Carlos Villegas told reporters that a prominent rebel commander, Alex Rendon, could be among the dead.
The army said the group was responsible for attacks on a local hospital, oil infrastructure and security forces in the area.
It said the group had combined with local leaders of the National Liberation Army, or ELN by its Spanish acronym, to try to control drug trafficking in the departments of Arauca, Boyaca and Casanare, as well as coordinate "extortion activities, arms trafficking and the articulation of terrorist plans."