"It was a collective decision of the people of El Geneina to leave", one resident told MSF from Chad.
"Most of them fled on foot heading northeast of El Geneina but many of them were killed on this route."
RSF leader Mohamed Hamdan Dagalo, known as Hemedti, said on Tuesday his force would investigate events in El Geneina.
Sultan Saad Bahreldin, leader of the Masalit tribe, the largest bloc of El Geneina residents, said there had been "systematic" killing in recent days.
Villages on the road from El Geneina to Adre used to be Masalit, but had been settled by Arab tribes since 2003, Ibrahim said.
Persons:
El Geneina, Ibrahim, El, Mohamed Hamdan Dagalo, Sultan Saad Bahreldin, Adre, Al Hadath, Eyewitnesses, Abdel Nasser Abdullah, Black, Nafisa Eltahir, Maggie Michael, Khalid Abdelaziz, Aidan Lewis, Frank Jack Daniel Our
Organizations:
Rapid Support Forces, Reuters, Medical, MSF, Sunday, Thomson
Locations:
El Geneina, CAIRO, Darfur, Chad, Khartoum, Adre, El, West Darfur, Saudi Arabia, U.S, Cairo, Dubai