U.N. investigators say rebels killed at least 30 civilians in a span of several days last month in the eastern Democratic Republic of Congo.
The U.N. mission in Congo says evidence shows that elements of the National Congress for the People's Defense (CNDP) allegedly carried out the killings around the middle of January in the village of Kalonge.
The group is headed by renegade General Laurent Nkunda.
At the time, a delegation representing the group was in Goma, the capital of North Kivu province, holding talks that would broker a ceasefire on January 23 involving government troops, Nkunda loyalists and a local militia.
Clashes have since taken place in eastern Congo involving rebel groups and government soldiers.
The peace deal aimed to end the general state of conflict and unrest that has endured in North and South Kivu provinces since the end of the country's civil war in 2003.
Some information for this report was provided by AFP, AP and Reuters.