Sudanese protesters have barricaded roads in the capital, Khartoum, as part of week-long demonstrations against a military coup.
Three people were killed on Saturday when security forces fired shots and tear gas to disperse protesters in the nearby city of Omdurman, medics said.
The interior ministry denied that live rounds had been fired.
The army seized power on Monday, detaining Prime Minister Abdalla Hamdok and other civilian leaders.
