0721 GMT January 20, 2022
The coup, led by army chief General Abdel Fattah al-Burhan on October 25, derailed a power-sharing transition between the military and civilians that had been painstakingly established in the wake of longtime autocrat Omar-al-Bashir's ouster in 2019, AFP reported.
Security forces fired tear gas as pro-democracy protesters headed towards the presidential palace, witnesses said, amid roadblocks seeking to prevent people converging there and at army headquarters – the epicentre of mass demonstrations that forced Bashir out.
Protesters also rallied in Omdurman, Khartoum's twin city, as well as northern Khartoum.
"No, no to military rule," the demonstrators chanted as they waved the national flag.
The protests since the coup – one of several power grabs in Sudan's post-independence history – has been met with a crackdown that has killed at least 60 people, according to medics.
Authorities have repeatedly denied using live ammunition in confronting protesters and insist scores of security forces have been wounded during demonstrations that have often "deviated from peacefulness".
Medics in white coats were seen joining Sunday's rallies to protest the security forces' storming of hospitals and medical facilities during previous demonstrations.
The Central Committee of Sudanese Doctors, affiliated with the protest movement, said Saturday that medics will deliver a memorandum to UN officials listing and complaining about "assaults" against such facilities.
Last week, Sudan's civilian prime minister, Abdalla Hamdok, resigned, saying the country was at a "dangerous crossroads threatening its very survival".
He had only taken his position back up on November 21, having originally been ousted along with his government in the October coup.
On Saturday, the United Nations said it would facilitate talks between key Sudanese stakeholders in a bid to resolve the crisis.
But the Forces for Freedom and Change (FFC), the civilian alliance which spearheaded the protests against Bashir and became integral to the transition government, said it had not received "any details" about the UN initiative.
Burhan has insisted that the October military takeover "was not a coup" but only meant to "rectify the course of the Sudanese transition".
The UN Security Council is to meet on Wednesday to discuss the latest developments in Sudan.