At least 16 civilians were killed overnight from Saturday to Sunday in several simultaneous attacks by ADF-Ugandan rebels.
The attacks took place in North Kivu province and Ituri province in the eastern Democratic Republic of the Congo (DRC), according to military sources.
In North Kivu, at least 10 civilians were killed in the attack.
In the neighbouring province of Ituri, another branch of the same rebellion launched the attack at the village of Boyo and killed six civilians.
The rebels clashed with elements of the DRC Armed Forces (FARDC) until late at night, according to Ituri army spokesman Jules Ngongo.
It has been several months that the foreign rebellion of the ADF-Ugandan group has been carrying out simultaneous attacks in the two neighbouring provinces despite military operations of the DRC supported by the UN mission.