Burundi and Rwanda dispute sections of border on the Akanyaru/Kanyaru and the Kagera/Nyabarongo rivers, which have changed course since the 1960s, when the boundary was delimited; cross-border conflicts among Tutsi, Hutu, other ethnic groups, associated political rebels, armed gangs, and various government forces persist in the Great Lakes region
Refugees and Internally Displaced Persons
Refugees (country of origin): 9,849 (Democratic Republic of the Congo)
IDPs: 100,000 (armed conflict between government and rebels; most IDPs in northern and western Burundi) (2007)