A medical source at El Obeid Hospital said a Rapid Support Forces drone struck the prison with a missile, "killing 19 inmates and wounding 45 others."
The dead were transferred to Al-Abyad Hospital, the source said, while the injured are receiving treatment at Al-Abyad and Al-Daman hospitals.
The city of El Obeid is under the control of the Sudanese army, which in February ended a two-year siege imposed by the Rapid Support Forces.
The army controls most of the cities in North Kordofan State, west of Khartoum, while the Rapid Support Forces control parts of it.
The city of El Obeid is a strategic logistics hub, located at a crossroads linking the capital, Khartoum, with the western Darfur region, where the Rapid Support Forces control most of the area.
Fourteen Sudanese members of the same family were killed in a bombing by Rapid Support Forces targeting the Abu Shouk camp for internally displaced persons in Darfur, western Sudan, on Friday evening, according to relief sources.
The Abu Shouk camp's emergency room reported on Saturday that the camp had witnessed "heavy artillery shelling by Rapid Support Forces," killing 14 members of one family and wounding others.
Abu Shouk camp is located in El Fasher, North Darfur, which has witnessed recent intense attacks by the Rapid Support Forces (RSF), resulting in the deaths of dozens and the displacement of hundreds of thousands from the city's refugee camps.
Rapid Support Forces attacks on Zamzam refugee camp in El Fasher led to residents fleeing to neighboring towns, leaving it "almost empty," according to the United Nations, after previously housing approximately one million people.
In the last week of April , the Resistance Committees Coordination in El Fasher documented the fall of more than 750 mortar shells, rocket launchers, tanks, and heavy artillery in what it described as a "bloody massacre against the city of El Fasher and its defenseless residents."
El Fasher is of strategic importance in the war between the army and the Rapid Support Forces, as it is the only major city in the vast Darfur region that remains outside the control of the Rapid Support Forces.
Meanwhile, Sudanese army aircraft bombed Rapid Support Forces (RSF) positions in the cities of Nyala and El Geneina in Darfur, destroying weapons and military equipment stores, according to a military source.
The military source, who requested anonymity, said, "Sudanese Air Force aircraft launched attacks on Rapid Support Forces positions in Nyala, the capital of South Darfur, and El Geneina, the capital of West Darfur, destroying weapons and military equipment stores that the militia intended to use in its hostile operations."
Since mid-April 2023, the Sudanese army and the Rapid Support Forces have been waging a war that has left more than 20,000 dead and approximately 15 million displaced and refugees, according to the United Nations and local authorities. Research by American universities estimates the death toll at approximately 130,000.