Burundians were the largest group of displaced people to repatriate in 2005. The United Nations Refugee Agency (UNHCR) assisted around 60,000 of the 400,000 Burundians living in Tanzania to return home, and more are expected to follow. The largest new refugee population in 2005 in the sub-region came from Central African Republic. More than 10,000 people started fleeing to southern Chad in June following attacks near the border by unidentified armed groups.