Five people, including a teenager, were shot dead in south-west Colombia on Sunday in the latest of a series of attacks by armed groups.
Six other people were injured.
A military commander blamed a breakaway rebel group for the attack.
The government signed a peace deal with the left-wing Revolutionary Armed Forces of Colombia (Farc) five years ago but some Farc members, who did not agree with the deal, broke away and have continued being active.
Army officials said that armed men had opened fired at “a public venue” in a rural area outside the town of Tumaco. Local media described the venue as a discotheque.
Two people were killed at the scene and three more died later in hospital. Local media reported that one of those killed was a 15-year-old girl.
Major-General Álvaro Vicente Pérez of the Colombian army said a group of dissident former Farc rebels calling itself the Uriel Rendón Column was to blame.
