The sources told Xinhua by phone that on Tuesday morning, there was still confusion in the area due to heavy gunshots that could be heard.
An investigation by local authorities has been launched.
Military sources on the ground told Xinhua army reinforcements were deployed to Oicha on Tuesday morning to bring the situation under control.
The number of casualties has not been revealed.
A massive movement of local residents was witnessed throughout the night heading towards Beni, a city in north eastern DR Congo, amid fear over violence. Enditem