We write to voice concern over the expulsion of persons of Rwandan and Burundian origin from Tanzania in recent months. According to testimony received by Human Rights Watch researchers, some expelled persons were threatened, beaten, and saw their property looted by Tanzanian officials, soldiers, and police officers or by militia groups acting with the apparent compliance of government officials. The expelled persons—including some who were recognized as refugees and others who were naturalized Tanzanian citizens—were driven from their homes without any semblance of legal procedure.