Protest leaders on Sunday said they suspended talks with Sudan's military council as they urged people to intensify their protest outside army headquarters in Khartoum and in other towns.
"We will continue the sit-in and we are suspending our talks with the military council.
"We are treating the military council as an extension of the regime," a spokesman of the protest movement Mohamed al-Amin announced in front of thousands of protesters gathered outside the army complex.
Amin also called on demonstrators to step up their protests until their demand for a transfer of power to a civilian council is met by the military.
The military rulers have resisted calls to transfer power immediately to a civilian body.
New army ruler General Abdel Fattah al-Burhan has pledged to respond to demonstrators' demands within a week.