The fighting has wrecked urban areas and has been marked by atrocities, including mass rape and ethnically motivated killings, that amount to war crimes and crimes against humanity, especially in the western region of Darfur, according to the United Nations and international rights groups.
The RSF, which controls most of the western region of Darfur, said that it downed a military aircraft on Monday in Nyala, the provincial capital of South Darfur province.
The Antonov aircraft crashed on Tuesday while taking off from the Wadi Sayidna air base north of Omdurman, the military said in a statement.
At least 46 people have died after a Sudanese military plane crashed in the city of Omdurman, officials said on Wednesday.
The military earlier said that armed forces personnel and civilians were killed in the crash, but didn't provide figures.