Sudan's paramilitary Rapid Support Forces, or RSF, say they've taken control of the army's headquarters in El Fasher, the last major city in the Darfur region not previously under their control.

In a statement, the RSF claimed it had "extended control over the city of El Fasher from the grip of mercenaries and militias," referring to the Sudanese army.

A video posted on social media by the RSF on Sunday also showed army vehicles retreating from the headquarters and its soldiers cheering in front of a sign marked "Sixth Division Infantry."

The army has yet to comment.

If confirmed, the RSF's claim would represent a significant gain in Sudan's two-year conflict. War broke out in Sudan in 2023, when the Sudanese army and the RSF, once allies, turned on each other.

It would see all five Darfur state capitals under RSF control, consolidating its recently established parallel administration in Nyala. 

Darfur citizens suffering humanitarian disaster

Around 260,000 civilians, half of them children, continue to be without aid or food in El Fasher.

Four United Nations agencies previously warned thousands of malnourished children are at "imminent risk of death" amid the collapse of health services. 

The UN has also raised concerns over potential massacres targeting non-Arab communities in the region, similar to those reported after the RSF captured the nearby Zamzam camp in April. 

Despite repeated international appeals, the two sides, who have both been accused of committing atrocities, continue to ignore calls for a ceasefire. 

Representatives from the United States, Egypt, Saudi Arabia and the United Arab Emirates met in Washington on Friday to "advance collective efforts toward peace and stability in Sudan."

A transition to civilian rule, according to US's senior advisor for Arab and African affairs Massad Boulos, is being sought with the four countries reaffirming support for a September peace proposal that called for a three-month truce.

However, the meeting seemed to yield little progress toward an end to hostilities.

Edited by: Jenipher Camino Gonzalez