Disputes - international:
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)