Delegates at Sudanese peace talks in Nigeria say they have adjourned until Sunday after government representatives and Darfur-based rebels failed to reach an agreement early Saturday.

African Union mediators say the two sides worked late into the night in an effort to break a deadlock over an agreement designed to disarm both rebels and government-backed militias in Sudan's western Darfur region. The talks are being held in the Nigerian capital, Abuja.

Meanwhile, at least 65 Rwandan soldiers flew from their capital, Kigali, Saturday, to join an expanded African Union peacekeeping force in Darfur. The United States is providing C-130 transport planes to fly in African troops from around the continent.

The 20-month-long conflict in Darfur has claimed the lives of 70,000 people and displaced more than 1 million.