Civilians attacked in Darfur region as Sudan fighting escalates

UN refugee agency extremely concerned' about effect on fragile' region, as evidence emerges of widespread destruction

Fighting has erupted in Sudan's Darfur region - including the use of heavy weaponry, and attacks on civilians and essential healthcare infrastructure - escalating a crisis now in its third week that was sparked by two rival generals.

Across the Sudanese capital, Khartoum, the sound of gunfire echoed through the streets throughout Sunday and airstrikes hit its twin city Omdurman.