Twenty-nine people have died in fighting between ethnically based armed groups in eastern Congo, activists say.
Rebels belonging to the Democratic Forces for the Liberation of Rwanda (FDLR) attacked a camp of the Popular Union for the Defence of the Innocent (UPDI) in the North Kivu province on Sunday, Edgar Mateso, a representative of civil society organisations in the region, said.
Guns and knives were used during the fight, Mateso said.
Army spokesman Hazukay Mongba confirmed that fighting had taken place.
The FDLR is a Rwandan Hutu rebel group operating in Congo, while the UPDI defends the Nande ethnic group. Dozens of people have been killed in clashes between the two militias in the last month, according to activists.