Khartoum, Sudan ? Ugandan rebel leader Joseph Kony has turned up at a neutral camp in southern Sudan as part of a truce to end 19 years of conflict in the east African nation, a rebel official said Sunday.

Kony, who is wanted by the International Criminal Court for war crimes and crimes against humanity, arrived at Ri-Kwangba camp, just 550 yards north of the border with Congo, said Martin Ojul, the head of the rebel team negotiating a peace deal with the Ugandan government.

He gave no further details on when Kony appeared.

Kony joins his deputy, Vincent Otti, whose arrival at the camp was announced on Sept. 11. Otti is also wanted by the Hague-based court.

Some 3,500 fighters and 400 women and children are also at the camp, according to Capt. Sunday Ocaya, who is also part of the rebel Lord’s Resistance Army’s negotiating team.

The truce calls for rebel fighters to gather in largely uninhabited areas across the border in southern Sudan, where they will be protected while a broader peace deal is negotiated.