Witnesses said the fighting between the army and the paramilitary Rapid Support Forces (RSF) was some of the heaviest for weeks, and included ground battles in the densely populated neighborhood of Haj Youssef in Bahri, one of three adjoining cities, along with Khartoum and Omdurman, that make up the capital around the confluence of the River Nile, Reuters reported.
Just after the ceasefire expired at 6 a.m. (0400 GMT) witnesses said clashes and artillery fire resumed in the north of Omdurman. They also reported clashes in southern and central Khartoum, and in Shambat along the Nile in Bahri up to the strategic Halfiya bridge, which crosses to Omdurman.
War between Sudan’s army and the paramilitary Rapid Support Forces (RSF) broke out on April 15 over tensions linked to an internationally backed plan for a transition towards civilian rule.
The conflict has displaced more than 1.9 million people, triggering a major humanitarian crisis that threatens to spill across a volatile region.
Fighting has been concentrated in the capital, much of which has become a war zone plagued by looting and clashes. But unrest has also flared elsewhere including the western region of Darfur, already suffering from a conflict that peaked in the early 2000s.
Residents and activists have reported a further deterioration in recent days in El Geneina, near the border with Chad, and new waves of attacks by Arab nomadic tribes with ties to the RSF.
Among those killed were a number of human rights activists, lawyers and doctors, according to the Darfur Bar Association, which monitors the conflict in the region.
Another affected city is El Obeid, capital of North Kordofan State southwest of Khartoum and on a major route to Darfur. Residents say it is effectively under a state of siege due to the conflict, with supplies of food and medicine cut off.
Some 400,000 of those who have fled their homes have crossed into neighbouring countries, about half of them heading north to Egypt.
The 24-hour ceasefire that began on Saturday morning was negotiated at talks led by Saudi Arabia and the United States in Jeddah. A previous, 12-day ceasefire agreed by the two sides in Jeddah had been repeatedly violated.