Reports suggest the camps were forcibly emptied and looted before being burned.
Aid groups say they are struggling to reach an estimated 250,000 people in the region fleeing fierce fighting between government and rebel forces.
Food and water are terribly scarce, and aid agencies have all but stopped work.
The BBC's Orla Guerin witnessed scenes of chaos at a refugee camp in Kibati on the outskirts as Goma, as desperately hungry people stampeded.
Children were trampled underfoot and panicked aid staff were forced to beat back the heaving crowd. More +video...