At least 18 people died in fighting between two FARC dissident factions for control of a drug trafficking area in Colombia's southern jungle, said Defense Minister Ivan Velasquez on Monday.
The clashes took place over the weekend in a rural area of Putumayo province, bordering Ecuador and Peru.
The incident is the highest death toll from fighting among illegal armed groups since President Gustavo Petro took office in August as Colombia's first leftist leader.