MONTREAL, QUEBEC–(Marketwire – May 4, 2010) –

IKD-36 intersects 13.22 g/t Au over 4.1m (true width)

IKD-32 intersects 8.02 g/t Au over 2.4 m (true width)

IKD-34 intersects 6.63g/t Au over 2.0 m (true width)

MDN Inc. (“MDN”) (TSX:MDN) is pleased to announce that all the assay results for the Ikungu project are now available. The results for the second part of the drilling program, which resumed on January 28, 2010 and was completed on March 17, show multiple mineralized intersections grading over 5 g/t and as high as 54.3 g/t Au. The mineralized zones lie along the known gold-bearing horizon that extends more than 2.5 km, and will be tested for vertical continuity by the next drilling program, now in the planning stage.

“Our experience at the Tulawaka gold mine and our knowledge of Archean greenstone belts lead us to believe that we are looking at a very large mineralized system. This 2.5 km gold-bearing structure contains multiple zones with sample grading over 10 g/t Au”, stated Marc Boisvert, P.Eng. Vice President Exploration for MDN

The entire MDN program (IKD-17 to IKD-37) was carried out from October 2009 to March 2010 and consisted of 21 diamond drill holes for a total of 4,369 m of drilling. Between the month of October and December 2009, MDN drilled 10 diamond drill holes (IKD-17 to IKD-26) totalling 2,024 metres that indicated the potential of the continuity of the gold-bearing mineralization over at least 2.5 km (news release dated March 5, 2010). The program was suspended in December and resumed in late January 2010 to identify high-grade zones along this horizon. Subsequently, eleven holes (IKD-27 to IKD-37) were drilled from the time that activities resumed until March 18. The mineralized horizon was thus tested over a distance of 2.5 km by holes drilled about 70 m apart, with only two of these drilled deeper than 100 metres.

Holes IKD-34, 36 and 37 confirm the presence of a higher-grade mineralized zone in the east sector between sections 3190 E and 3790 E. The same applies to holes IKD-32 and IKD -35 in the central sector, for a second zone between sections 2435 E and 2770 E. Hole IKD-33 returned an intersection of 2.66 g/t Au over 5.36 m at the western end, indicating that the mineralized horizon traced over 2.5 km remains open to the west.

Assay results for IKD-31 to IKD-37 (IKD-17 to IKD-30 were released March 5, 2010):

Intersections indicating the presence of high-grade zones:

The assay results received to date confirm that the mineralization is continuous over more than 2.5 km, with a minimum thickness of 2 metres and sample grades above 1.2 g/t Au. This gold-bearing horizon hosts higher-grade zones 2 to 4 metres thick ranging from 5 g/t Au to 11.5 g/t Au, including sections of up to 54.3 g/t over 0.4 m. The gold-bearing intersections for holes IKD-08, IKD-28, IKD-36, IKD-37, SIK1 and SIK 8 are good examples of these higher-grade zones. A concentration of such zones has been identified in the central and eastern sectors, with a higher occurrence of zones with average sample grade over 10 g/t Au toward the east.

Compilation table for all the holes that intersected the mineralized horizon:

East Sector

Central Sector

West Sector

The samples were analysed by fire assay at the SGS Laboratory of Mwanza, Tanzania, which is a certified facility according to international standards. A rigorous quality analysis verification program implemented by MDN included 20% control samples. The technical and scientific information contained in this press release has been reviewed by Marc Boisvert, P.Eng. MDN’s Vice President, Exploration, who acts as a qualified person in accordance with National Instrument 43-101.

About MDN

MDN Inc.(TSX:MDN) is a mining exploration and development company with adequate financial resources to develop its exploration projects in Québec and in Tanzania. MDN also remains active in the search for new business opportunities that can raise shareholder value. In addition to its 30% participating interest in the Tulawaka Gold Mine, MDN is the operator and owner of a majority interest in mineral licenses totalling 715 sq km around the Tulawaka gold mine in Tanzania. The company also owns a 67.5% interest in Crevier Minerals Inc. which owns a property with a 25.8 M tonne NI 43-101 niobium and tantalum resource located in the Lac St-Jean area of Québec. MDN has an option to increase its equity participation in Crevier Minerals Inc. up to 87.5%. Additional information is available on MDN’s website at www.niobaymetals.com.

Forward looking statements

All statements in this release, other than statements of historical fact, that address events or developments that the Company expects to occur, are forward looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements are discussed in greater detail in the Company’s most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. Investors and others who base themselves on the Company’s forward-looking statements should carefully consider the factors mentioned in the Annual Information Form as well as the uncertainties they represent and the risk they entail. The Company believes that the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this press release should not be unduly relied upon. These statements speak only as of the date of this press release.