Sustained clashes and artillery fire were reported in parts of Sudan's capital Khartoum early on Sunday soon after the end of a 24-hour ceasefire that had brought a brief lull to eight weeks of fighting between rival military factions.

Witnesses said fighting resumed after the ceasefire expired at 6 a.m. (0400 GMT) in the north of Omdurman, one of three adjoining cities, along with Khartoum and Bahri, that make up the capital around the confluence of the River Nile.

Residents said there had been artillery fire in the Sharq el-Nil area on the eastern outskirts of the capital, and around a bridge linking Omdurman and Bahri. Blasts and clashes were also reported in Khartoum.

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.

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 nomadic Arab tribes with ties to the RSF. The city has been largely cut off from telephone networks for several weeks.

(Cover: Smoke rises as the clashes between the Sudanese Armed Forces and the paramilitary Rapid Support Forces (RSF) continue in Khartoum, Sudan on June 9, 2023. /CFP)