======================================================================= Re: News Release - Wednesday, June 23, 2010 Osisko Assumes Management of Brett ======================================================================= News Release 10-17 View News Release in PDF Format: http://www.brettresources.com/i/pdf/2010-06-03_NR.pdf
Brett Resources Inc.

("Brett") (TSX Venture Exchange -- BBR) is pleased to announce the appointment of Messrs.

Sean Roosen, Robert Wares, Bryan A.

Coates, John Burzynski, Sergio Cattalani and Robert Mailhot as the new management team for the Company.

Mr.

Roosen takes over as President and CEO, Mr.

Wares as Chief Operating Officer, Mr.

Coates as Chief Financial Officer, Mr.

Burzynski as Vice President Corporate Development, Mr.

Cattalani as Vice President Exploration, and Mr. Mailhot as Vice President Human Resources.

The new management team are executives of Osisko Mining Corporation which acquired a 77.8% interest in Brett on May 19, 2010 pursuant to a friendly takeover bid. The Company would like to thank outgoing President Mr.

Patrick Soares and his team for their outstanding contributions in guiding Brett Resources up to the acquisition by Osisko, and for realizing true shareholder value through his tireless efforts.

Osisko intends to effect a subsequent acquisition transaction within the next 12 weeks in order to acquire all of the remaining Brett shares that were not tendered on May 19, 2010.

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(28.4 Mt @ 0.92 g/t Au & 217.4 Mt @ 1.16 g/t Au), plus a global measureyd and indicated resource of 2.23 million ounces (70.4 Mt @ 0.99 g/t Au) and an inferred resource of 0.47 million ounces (20.0 Mt @ 0.73 g/t Au). 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 Bretts 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.

Sean Roosen, 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 Corporations 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 Corporations 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 Corporations 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. ======================================================================= Copyright (c) 2010 BRETT RESOURCES INC.

(BBR) All rights reserved.

For more information visit our website at http://www.brettresources.com/ or send mailto: =======================================================================