NYALA, Sudan Darfur refugees rioted Monday and forced the U.N. humanitarian chief to rush from their camp, then later attacked African peacekeepers and killed a translator in a sign of deep tensions in the war-torn region despite a fragile peace deal.

The violence broke out as the U.N.'s Jan Egeland toured Kalma camp, home to some 90,000 displaced people driven from their villages in Darfur. He was met by about 1,000 protesters demanding U.N. peacekeepers be deployed in the region.