| Disputes - international: | Tanzania still hosts more than a half-million refugees, more than any other African country, mainly from Burundi and the Democratic Republic of the Congo, despite the international community's efforts at repatriation; disputes with Malawi over the boundary in Lake Nyasa (Lake Malawi) and the meandering Songwe River remain dormant |
| Refugees and internally displaced persons: | refugees (country of origin): 393,611 (Burundi), 150,112 (Democratic Republic of the Congo) (2006) |
| Illicit drugs: | growing role in transshipment of Southwest and Southeast Asian heroin and South American cocaine destined for South African, European, and US markets and of South Asian methaqualone bound for southern Africa; money laundering remains a problem |
