The repatriation of about 20,000 Rwandans living illegally in Tanzania will be a gradual and voluntary process, Maj Tumainiel Kiwelo, the commissioner for Kagera Region, where the Rwandans are living, told IRIN on Monday. Roughly 600 Rwandans had applied to remain in Tanzania as residents, while the rest had not done so, because they wanted to go back, he said.