Air strikes in Khartoum were reported by eyewitnesses in southern Omdurman and northern Bahri, the two cities that lie across the Nile from Khartoum, forming Sudan's "triple capital.
The fighting has spread to the western region of Darfur, but has been concentrated in the capital. The Sudanaese army has now attacked its paramilitary rivals around a hospital that witnesses said was damaged in the bombardment.