Suspected Allied Democratic Forces militants accused of carrying out the overnight attack in the village of Makugwe, in the Beni area of North Kivu province.
The Daesh group claimed responsibility for the attack during a Sunday service at a Protestant church in the eastern Congolese town of Kasindi.
At least five people were reported killed and 15 others injured in a bombing in the city of Kasindi that the army blamed on the Allied Democratic Forces (ADF) armed group.
Attacks by militias across eastern Democratic Republic of the Congo leave over a dozen people dead since Friday, including six miners who were decapitated by CODECO group rebels, officials say.
Out of the 872 inmates, all but 49 had escaped Kakwangura central prison in the town of Mutembo, after armed men attacked the prison leaving at least two police dead, sources say.
Five bodies were brought to a hospital from a village west of Oicha in North Kivu while seven more arrived from another village to the west of the town.
Witnesses believe the attack was conducted by fighters associated with Daesh.
Latest violence comes amid tensions between DR Congo and Rwanda over M23, another rebel group.
"Operation Shujaa will officially cease in about two weeks according to our original agreement," says Uganda's General Muhoozi Kainerugaba, but Kinshasa insists it's "too soon" for any such decision on a pullout.
An attack by suspected rebels from the Allied Democratic Forces has left over a dozen people dead in the village of Masambo.
At least 52 people were killed in separate but simultaneous attacks in three villages in the Ituri province.
At least 12 civilians and 38 rebels have died in four days of fighting in the country's northeast, where the army is battling the Allied Democratic Forces and an ethnic-based militia called CODECO.
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