 The paramilitary rapid support forces began fighting the regular army for control of Sudan last April. In their latest advance, they say they've occupied the town of Singa on the Blue Nile, the capital of Senna state. This area controls transport routes from Port Sudan on the Red Sea, where the government and the army are now based. Videos online show armed men in front of police and government buildings, brandishing guns and shouting Allahu Akbar. Footage also shows residents and civilian vehicles fleeing Singa.