A Ugandan official says the leader of the brutal rebel group the Lord's Resistance Army has crossed back into Congo from Sudan.
U.S. State Department official Karl Wycoff, meanwhile, said Friday he has seen no evidence Sudan was helping rebel leader Joseph Kony.
Ugandan army spokesman Felix Kulayigye says Kony entered the Darfur region of Sudan in October but has since returned to Congo. Ugandan officials worried Kony may have been receiving support from Sudan's capital.
Khartoum once backed Kony but severed the relationship in 2005, when north and south Sudan signed a peace deal.
The LRA began its attacks in Uganda more than 20 years ago. Kony is wanted by the International Criminal Court under a 2005 warrant for crimes against humanity in Uganda.