The Sudanese camps where some 2 million refugees live are nearing capacity. According to a new U.N. report on the Darfur crisis, 80,000 people already have fled their homes this year, and some camps have been forced to turn them away.
Several camps are having to turn away new groups of refugees, a report for UN Office for the Co-ordination of Humanitarian Affairs says.
More than 80,000 people have fled violence in the region since the beginning of the year, the report adds.
Two million people are living in camps both within Sudan and in neighbouring Chad since conflict began in 2003.
Many fled their homes because of the ongoing violence between pro-government Arab Janjaweed militia groups and rebel groups in Darfur. At least 200,000 have died.