Eight people were shot dead by an unidentified armed group in a contested drug trafficking area in southwestern Colombia on Saturday night, authorities said, APA reports quoting Reuters.
The killings in Narino province, near the border with Ecuador, took place around midnight, the armed forces said in a statement.
The attackers wore balaclavas to cover their faces and carried long-range weapons, a police source said.
Colombian President Ivan Duque condemned the attack on Twitter and said high-ranking officials from the police and the army were on their way to the area.
Advocacy group Human Rights Watch and the Colombian human rights ombudsmen also condemned the killings.