Sudan's Vice-President of the Transitional Military Council and senior military leader, General Mohamed Hamdan Dagalo, welcomed a power-sharing agreement on Saturday.
"We commend the mediators from the African Union and Ethiopia for their ongoing efforts", State Department spokeswoman Morgan Ortagus said in a statement.
The deal revived hopes for a peaceful transition of power in a country plagued by internal conflicts and years of economic crisis that helped to trigger the overthrow of Omar al-Bashir in April.
Sudanese Gen. Abdel-Fattah Burhan, head of the military council, waves to his supporters upon his arrival to attend a military-backed rally.
State Department officials declined to comment on US efforts to broker the deal, saying only that Washington welcomes the agreement and commends the AU and Ethiopia for their mediation efforts.
The first is that under the agreement, the military would lead the TMC for the first 21 months of its existence. The sovereign council would include five military figures and five civilians, with an additional civilian member agreed by the two sides, and that the deal would be finalised by Monday.
Experts believe the agreement will end the political deadlock and protests which rocked the country for almost two months after the overthrow of long-time leader Omar al-Bashir.
Burhan also insisted that the military council did not order the violent dispersal of the main protest camp last month, which killed scores of people and led to the collapse of talks. The protesters will select a Cabinet of technocrats, and a legislative council is to be formed after three months.
As part of the power-sharing agreement, the two sides agreed on an independent Sudanese investigation into the deadly crackdown, but the details have yet to be worked out.