KINSHASA, Congo (AP) — The United Nations says one Tanzanian peacekeeper has been killed and 12 others injured after an attack in eastern Congo by Ugandan rebels belonging to the group known as ADF.

U.N. Congo mission spokeswoman Florence Marchal said suspected rebels attacked early Monday near a U.N. base in Mamundioma, about 35 kilometers (22 miles) from Beni and have seized weapons. She said forces have been deployed to the area in the North Kivu province as fighting continues.

ADF rebels in September killed a Tanzanian peacekeeper there.

The assault comes after local administrator Amisi Kalonda said fighting in the region overnight Saturday killed 10 people. However, David Muhaze, the president of a civil society organization, said at least 22 people are missing. The total of missing and dead could not be confirmed.