"The Sudanese military junta and protest leaders will announce the composition of the Sovereign Council on August 18," the leader of the Sudanese protest movement, Munther Abu al-Maali, said on Monday. "On August 20, the prime minister will be announced.

Representatives of Sudan's military junta and the main opposition coalition signed the constitutional declaration on Sunday, paving the way for the formation of a transitional government.

Sources familiar with the negotiations told Reuters earlier on Sunday that the two sides were due to sign the constitutional declaration final on Aug. 17.