The announcement came after a meeting of African Union (AU) member states in Addis Ababa after escalating violence in Sudan this week, Reuters reported.
Security forces of the Transitional Military Council, which overthrew President Omar al-Bashir, launched an attack on protesters in the capital Khartoum on Monday.
At least 108 people, including 40 whose bodies were found in the waters of the Nile River, were killed and 326 wounded as a result of the crackdown, the doctors' committee said. While the Sudanese Ministry of Health said Thursday that the official number of those killed on Monday rose to 61.
The leaders of the mass movement refused to call the Transitional Military Council to negotiate, saying "we need justice and accountability before talking about any political process."
The United Nations said on Wednesday it was temporarily relocating some of its staff in Sudan, due to the deteriorating security situation in the country.