Northwestern confirms higher-grade uranium mineralization on Niger properties; submits over-limit samples for re-analysis

    TORONTO, April 30 /CNW/ - Northwestern Mineral Ventures Inc. (TSXV: NWT;
OTCBB: NWTMF) is pleased to announce additional assay results from rock
samples collected during a first-pass reconnaissance exploration of airborne
anomalies on its 100%-owned In Gall and Irhazer uranium properties in Niger.
Findings reveal the highest levels of uranium mineralization discovered on the
properties to date, with values of up to 0.18% U(3)O8. In addition, several
samples exceeded the 0.24% U(3)O(8) detection limit in tests that are commonly
used to analyze samples from Niger. The above-limit samples have been
scheduled for further analysis using a technique that can accurately measure
higher uranium values.
    "The initial rock sample results, which we reported in early March,
confirmed uranium mineralization in one highly prospective area. These new
findings include even greater uranium values from a new discovery zone that is
situated 4.0 miles (6.3 kilometers) east of the original area of
mineralization," said Marek J. Kreczmer, President and CEO of Northwestern.
"Based on results to date, we believe that these two areas are part of a
larger mineralized system."
    The new discovery, called the Bingo zone, is associated with a
radioactive structural dome that is geologically similar to others that have
been proven to host uranium mineralization in Niger. It is favorably located
on a fault that contains uranium deposits along strike elsewhere in the


    Assay results from 16 surface rock chip samples, which were collected
from outcrops covering a large area during a first-pass reconnaissance
exploration of anomalies identified during an earlier airborne survey, reveal
uranium values of up to 0.18% U(3)O(8). Details of the 10 assays that returned
values above 0.09% U(3)O(8) are provided in the table below.

    Sample ID    Scintillometer     Uranium         U(3)O(8)        U(3)O(8)
                 Intensity (cps)   (U_IMS40B)        (ppm)            (%)
    ING-A10-001            8000      greater         greater         greater
                                   than 2000       than 2358       than 0.24
    ING-A10-002           37000      greater         greater         greater
                                   than 2000       than 2358       than 0.24
    ING-A10-003           17000      greater         greater         greater
                                   than 2000       than 2358       than 0.24
    TNX_002               26000      greater         greater         greater
                                   than 2000       than 2358       than 0.24
    TNX_004                 350      greater         greater         greater
                                   than 2000       than 2358       than 0.24
    FAX_001             greater         1555            1833            0.18
                      than 9999
    IRZ-A07-001            3750         1109            1308            0.13
    TNX_001                6993         1018            1200            0.12
    AZX_100                3600          760           904.8            0.09
    ING-A16-001            3000          757             893            0.09

    Producing mines and deposits in Niger typically grade from 0.1% to 0.42%
U(3)O(8), with the highest grades being mined at greater depths.
    Findings from the re-analysis of over-limit samples will be announced
once they have been received. SGS Lakefield Research Africa has advised
Northwestern that the expected minimum turnaround time for these results is 
5-6 weeks. As such, results are not expected until June at the earliest.
    In Gall and Irhazer cover 988,000 acres (4,000 square kilometers) of
highly prospective land within the same stratigraphy as two operating uranium
mines that together provide almost 10% of worldwide production. Niger
currently ranks as one of the world's top producers of uranium.
    With excellent results from rock sampling, reconnaissance exploration and
an airborne survey, Northwestern anticipates the commencement of drilling
before the rainy season. The drill remains en route to Africa from France,
having been delayed because of mechanical problems with the ship transporting
the equipment. Northwestern is making arrangements to have the drill arrive in
Niger as quickly as possible. Drilling is expected to commence as soon as the
drill arrives and the company receives permission from the Government of Niger
to commence drilling. Northwestern will provide an update as developments

    Quality Assurance

    Fieldwork in Niger is being conducted under the supervision of Abdelkarim
Aksar, P.Geo., Northwestern's Niger Project Manager. Laboratory analysis was
conducted by SGS Lakefield Research Africa by Aqua Regia Digest followed by
ICP-OES. Analysis of all samples is carried out using Standard Reference
Materials and a minimum of 10% of samples are analyzed in duplicate.
Re-analysis is being conducted by SGS using borat fusion followed by x-ray
fluorescence. Northwestern and SGS both maintain comprehensive and independent
Quality Control/Quality Assurance programs.


    Northwestern Mineral Ventures ( is an
international resource exploration company with an experienced management
team. The company is focused on properties in Niger and Canada with potential
uranium targets. Northwestern also has a precious and base metal property in
Mexico. Northwestern is listed on the NASD Bulletin Board under the symbol
"NWTMF" 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 Northwestern's Niger
properties and it is uncertain if further exploration will result in the
target being delineated as a mineral resource.
    Additional information about Northwestern's Niger properties is contained
in press releases dated March 15, 2006, March 1, 2006, December 14, 2006,
October 25, 2006, September 29, 2006, September 22, 2006, June 15, 2006,   
May 23, 2006, May 2, 2006 , March 27, 2006 and March 8, 2006.

For further information:

For further information: Marek J. Kreczmer, M.Sc., P.Eng., President and
CEO, (866) 437-9551,

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