Congolese government forces are fleeing the eastern capital of Goma as Rwandan-backed rebels press towards the town, threatening a lethal confrontation with United Nations peacekeepers and the prospect of all out regional war.

Western aid workers in Goma, with a population of 600,000, described scenes of mayhem in the streets as columns of government tanks and military vehicles streamed out of the city and panicking civilians fled for cover, fearing an imminent rebel onslaught.