President Obama's special envoy to Sudan, retired Air Force Maj. Gen. J. Scott Gration, said Wednesday that the Sudanese government is no longer engaging in a "coordinated" campaign of mass murder in Darfur, marking a shift in the U.S. characterization of the violence there as an "ongoing genocide."

"What we see is the remnants of genocide," Gration told reporters at a briefing in Washington. "The level of violence that we're seeing right now is primarily between rebel groups, the Sudanese government and . . . some violence between Chad and Sudan."

Gration's remarks come as the Obama administration is finishing a review of its Sudan policy. The comments appeared to expose an emerging rift between Gration and Susan E. Rice, the U.S. ambassador to the United Nations, who accused the Sudanese leadership of genocide as recently as two days ago.