There are several bands named Urban Tribe.

(1) A house/techno/electro/dub project under the direction of Sherard Ingram a.k.a Drexciyan DJ Stingray with contribution of well known members of Detroit house and techno scene - such as Carl Craig, Shake and Kenny Dixon Jr. Urban Tribe have recorded for Mo' Wax, Planet E, Clone, Créme Organisation and TRUST.

(2) A reggae band from Stockholm/Sweden, that was founded as tribute to a bar in Thailand named Bob's Bar, which is the name of the first album as well. A second album, "Who Is the Enemy" was released in 2006.
See http://www.urbantribe.nu for further reading.
Since january 2007 their name is changed to Urban Tribe Stockholm.
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Artist biography from last.fm