The Kivu Security Tracker (KST), a network of observers based in DRC's restive east, counted "at least 46" dead in the Lala camp in Djugu territory, after the attack on Sunday night.
A community leader Desire Malodra gave the same death toll of 46, adding that 23 of them were children.
According to the official, the incident occurred in the "LALA" camp and was carried out by the Cooperative for the Development of the Congo (CODECO) organization, one of numerous militias active in the conflict-torn east of the Congo.
CODECO claims to represent the interests of ethnic Lendu farmers, who have been at odds with ethnic Hema herdsmen for a long time.
The United Nations state that CODECO's forces massacred hundreds of civilians in Ituri province, east of the country, and drove thousands of people from their homes.