Hooded men in uniforms without insignias killed 12 members of the Awa indigenous group, including five children, on a reserve in a region plagued by the cocaine trade, Colombian authorities said.
Indian leaders said the killings took place at 5 a.m. on the Gran Rosario reserve about 50 miles inland from the Pacific port of Tumaco. About 1,500 Awa live on the reserve.
The state governor, Antonio Navarro, said the victims were related. The attack killed five men, two women, two boys, two girls and a baby. He said two males, a 10-year-old and a 20-year-old, were wounded but fled and survived.
The killers' identities were not immediately known.