VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 05/31/12 -- American Manganese Inc. ("American Manganese" or the "Company") (TSX VENTURE:AMY)(PINKSHEETS:AMYZF)(FRANKFURT:2AM) reports that the TSX Venture Exchange (the "Exchange") has approved the extension in the expiry date of the following warrants:

Prospectus Unit Offering:                                                   
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# of Warrants (not including Agents Warrants):          4,309,185           
Original Expiry Date of Warrants:                       June 16, 2012       
New Expiry Date of Warrants:                            June 16, 2013       
Exercise Price of Warrants:                             $0.30               
                                                                            
Private Placement:                                                          
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# of Warrants:                                          1,990,174           
Original Expiry Date of Warrants:                       August 11, 2012     
New Expiry Date of Warrants:                            August 11, 2013     
Exercise Price of Warrants:                             $0.25               

On behalf of Management

AMERICAN MANGANESE INC.

Larry W. Reaugh, President and Chief Executive Officer

www.americanmanganeseinc.com

This news release may contain certain "Forward-Looking Statements" within the meaning of Section 21E of the United States Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact, included herein are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations are disclosed in the Company's documents filed from time to time with the TSX-Venture Exchange, the British Columbia Securities Commission and the US Securities and Exchange Commission.

The TSX-Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.