BBR Brett Resources

Brett Resources Inc. ("Brett") (TSX VENTURE: BBR) is pleased to announce that Osisko has been successful in its offer to acquire Brett. A total of 88,295,814 common shares of Brett were validly deposited at the expiry time of the offer representing approximately 77.28% of Brett's issued and outstanding common shares.

Osisko has taken up the shares and payment will be made on or before May 25, 2010. Brett shareholders who tendered to the offer will receive 0.34 of an Osisko common share plus Cdn.$0.0001 for each common share of Brett tendered, subject to adjustment for fractional shares. Accordingly, Osisko will issue approximately 30,020,577 common shares in respect of the offer.

Osisko President and Chief Executive Officer Sean Roosen said: "We would like to thank the Brett shareholders for their support and to welcome them to Osisko in our quest to become the next leading intermediate gold producer. Our flagship Canadian Malartic project is progressing well, with the mine build on schedule and on budget. We anticipate completing the build early next year and following commissioning, achieving commercial production in the second quarter of 2011. We also have one of the largest drill programs in our sector, with over 300,000 metres of new exploration and definition drilling in progress this year, and expect to see another good year of growth in our resource table that will enhance value for our shareholders."

"This strong endorsement by our shareholders confirms that the combined entities of Brett and Osisko will form the next leading intermediate gold producer," said Patrick Soares, President and Chief Executive Officer of Brett Resources.

Osisko intends to effect a subsequent acquisition transaction within the next 120 days in order to acquire all of the remaining Brett shares. Osisko intends to vote all of the Brett common shares acquired under the offer in favour of any subsequent acquisition transaction. On completion of a subsequent acquisition transaction, Osisko intends to de-list the Brett shares from the TSX Venture Exchange.

About Osisko

Osisko Mining Corporation is currently developing the Canadian Malartic gold deposit and evaluating adjacent areas for a large-scale open pit, bulk-tonnage mining operation. The Canadian Malartic deposit currently represents one of the biggest gold reserves in Canada for a single deposit, and is still growing through ongoing drilling on new mineralized zones. Current reserves for the Canadian Malartic property (including the adjacent South Barnat deposit) are 8.97 million ounces, plus a global measured and indicated resource of 2.23 million ounces and an inferred resource of 0.47 million ounces.

About Brett Resources Inc.

Brett Resources Inc. is a Canadian minerals exploration company whose primary mandate is the discovery, acquisition, and development of precious metals systems, with particular expertise in Canada and Latin America. Since 2006 Brett's primary focus has been the 100 percent owned Hammond Reef Gold Deposit in Ontario where an inferred resource of 6.70 million ounces of gold, 259.4 million tonnes at a grade of 0.8 grams per tonne utilizing a 0.3 gram per tonne gold cut-off has been outlined.

Patrick Soares, President & CEO

Forward Looking Statements

Certain statements contained in this press release may be deemed "forward-looking statements". All statements in this release, other than statements of historical fact, that address events or developments that the Corporation expects to occur, are forward looking statements. Forward looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects", "plans", "anticipates", "believes", "intends", "estimates", "projects", "potential", "scheduled" and similar expressions, or that events or conditions "will", "would", "may", "could" or "should" occur. Although the Corporation believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, including, without limitation that all technical, economical and financial conditions will be met in order to put the Canadian Malartic Project into commercial production or that Osisko will complete the acquisition of all of the outstanding shares of Brett Resources Inc., 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 include gold prices, access to skilled consultants, mining development and mill production personnel, results of exploration and development activities, the Corporation's limited experience with production and development stage mining operations, uninsured risks, regulatory changes, defects in title, availability of personnel, materials and equipment, timeliness of government approvals, actual performance of facilities, equipment and processes relative to specifications and expectations, unanticipated environmental impacts on operations market prices, continued availability of capital and financing and general economic, market or business conditions. These factors are discussed in greater detail in the Corporation's most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. The Corporation cautions that the foregoing list of important factors is not exhaustive. Investors and others who base themselves on the Corporation's forward-looking statements should carefully consider the above factors as well as the uncertainties they represent and the risk they entail. The Corporation 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.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Contacts: Brett Resources Inc. Tony Perri Manager, Investor Relations 604-488-0008 604-669-2543 (FAX) tperri@brettresources.com www.brettresources.com Wani Capital Raju Wani 403-240-0555