NWT announces 20% increased uranium grades at Niger Uranium's In Gall property; Resource calculation to be completed in June 2008

About this update from Captor Capital Corp

TORONTO, May 22 /CNW/ - NWT Uranium Corp. (TSX-V: NWT; OTCBB: NWURF) is pleased to provide an update for its shareholders regarding the exploration activities of Niger Uranium Limited, of which NWT is the largest shareholder with a 30.5% ownership position. Niger Uranium reports that a resource calculation is underway for a 16,400-foot by 2,950-foot (5,000-meter by 900-meter) area at the In Gall property, which contains a continuous near-surface layer with a mean borehole interval grade of 146 parts per million (ppm) equivalent U(3)O(8) (eU(3)O(8)) over 3.9 feet (1.2 meters), as detailed in a press release dated May 14, 2008. This grade represents an increase of 20% over previously reported grades, as a result of final calibration of the radiometric probe. Niger Uranium expects the resource calculation to be completed in June. Step-out drilling is planned to significantly extend the resource. In addition, one borehole outside of the defined "resource area" drilled the same layer 3.7 miles (6.0 kilometers) along strike and returned an intersection of 15.0 feet (4.6 meters) with a grade of 172 ppm eU(3)O(8), using radiometric probing, illustrating the potential for thicker development of the mineralized layer. Similar high-tonnage open-pittable surface deposit projects within Africa typically have cut-off grades of between 40 and 80 ppm U(3)O(8). Drilling to date has only tested approximately 20% of the historically delineated mineralized area. The mineralization remains open and historical maps indicate that it could extend up to 9.3 miles (15.0 kilometers) to the west. Niger Uranium reported that it will commence extension drilling in June to significantly expand the resource area. For further information on Niger Uranium's 2008 exploration program and complete details of the borehole intersections, please visit the company's web site at www.niger-uranium.com, where the complete press release from May 14, 2008 can be viewed. NWT contributed the Irhazer and In Gall properties to Niger Uranium, as detailed in a press release dated July 26, 2007. NWT owns 30.5% of Niger Uranium following Niger Uranium's acquisition of a significant interest in private South American uranium explorer, UrAmerica plc. On closing of the transaction, NWT acquired a stake in UrAmerica of approximately 6.3% based on its percentage interest in Niger Uranium. If warrants issued as part of the agreement are exercised, NWT would then hold 10.3% of UrAmerica. For more information on the acquisition, please visit Niger Uranium's web site. Quality Assurance Drilling was completed under the direction of MSA Geoservices of South Africa. All boreholes were vertical and drilled by the tri-cone method and probed with a Robertson gamma tool which was calibrated by Terratec Geoservices at the Medusa facility in the Netherlands. Final calibration resulted in a conversion factor of 0.157 ppm eU(3)O(8) per radiometric count. Additional validation of the gamma tool results is provided by the results of the XRF analyses on samples from 15 boreholes within the "resource area." All boreholes were drilled by the tri-cone method. Qualified Person The information contained in Niger Uranium's announcement has been reviewed by Keith Kenyon (MSc. AUS IMM), Geochemical Consultant to Niger Uranium. He is the Qualified Person overseeing the geochemical exploration on the In Gall-Irhazer licenses. Mr. Kenyon has 36 years experience in gold and uranium exploration and geochemistry and he is undertaking to act as a Qualified Person for the purposes of this announcement. The chemical analyses were undertaken by SGS Minerals, Southern Africa; 58 Melvill Street, Booysens, Johannesburg, 2091, Tel. +27 (0)11 680-3466. This is a properly equipped, fully accredited laboratory undertaking analyses and assays for the mining industry. ABOUT NWT URANIUM: NWT Uranium Corp. (www.nwturanium.com) is an international resource exploration company with an experienced, highly technical management team. Since its inception, NWT has concentrated on the acquisition of properties with potential uranium targets. NWT Uranium is listed on the NASD Bulletin Board under the symbol "NWURF" and the TSX Venture Exchange under the symbol "NWT." The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this news release. This news release includes certain "forward looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. Without limitation, statements regarding potential mineralization and resources, exploration results, and future plans and objectives of the Company are forward looking statements that involve various degrees of risk. The following are important factors that could cause the Company's actual results to differ materially from those expressed or implied by such forward looking statements: changes in the worldwide price of mineral commodities, general market conditions, risks inherent in mineral exploration, risks associated with development, construction and mining operations, the uncertainty of future profitability and the uncertainty of access to additional capital. Potential quantity and grade is conceptual in nature, there has been insufficient exploration to define a mineral resource on any of the properties referenced in this press release and it is uncertain if further exploration will result in any such targets being delineated as a mineral resource.

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