Protest leaders in Sudan are urging their followers to continue a sit-in Tuesday aimed at forcing the new military rulers to hand over power to a civilian government.
The Sudanese Professional Association, which is leading the mass protests, had called for a march in Khartoum on Tuesday, followed by a mass rally on Thursday.
Monday saw protesters operating checkpoints on roads at their main protest site at Khartoum's military headquarters. Sudan's Transitional Military Council had called for "immediate opening of the roads and removal of the barricades" at the protest site.
The council's warning came a day after talks between the protesters and the military broke down because the military refused to transfer power to a civilian government.
Protesters have been demanding a change in regime since December.
Meanwhile, Egypt is set to host an emergency summit of African leaders Tuesday on the situation in Sudan.
Sudan's military removed President Omar al-Bashir from power on April 11, after three decades in power. But since then, the military has not transferred power to a civilian council as demanded by the protesters.