The city of Warri is an oil hub within South-South Nigeria and houses an annex of the Delta State Government House. Warri is one of the major hubs of the petroleum industry in Nigeria. Warri, Udu, Okpe and Uvwie are the commercial capital of Delta State with a population of over 311,970 people in 2006. The city is the indigenous territory of Itsekiri, Urhobo and Ijaw people.