‘Congolese troops killed two United Nations peacekeepers after civilians accused the Tanzanian U.N. troops of providing supplies to Islamist Ugandan rebels in east Congo, according to a confidential U.N. Security Council report.

U.N. experts who monitor sanctions on Democratic Republic of Congo said the U.N. peacekeeping force MONUSCO initially blamed the Allied Democratic Forces (ADF), Ugandan rebels operating in Congo since the 1990s, for a May 5 ambush that killed two peacekeepers and several civilians and injured 26 U.N. troops.

But the group of experts said it was not an ambush and that Congolese troops (FARDC) fired at peacekeepers near the Mayi Moya town in Beni after “they had been told by two civilians that the Tanzanians were providing supplies to the ADF.”‘

Read more: Congolese army attacked U.N. troops meeting Islamist rebels: U.N