Acero-Martin Exploration Inc.: Letter of Intent, Revised Terms of $0.05 Per Unit Non-Brokered Private Placement, Change in Board of Directors

Market Wire, June, 2009

Acero-Martin Exploration Inc. (the "Company") (TSX VENTURE: ASD)(FRANKFURT: AMX) is pleased to announce that it has entered into a Letter of Intent ("LOI") with Solitaire Minerals Corp. (TSX VENTURE: SLT), as announced by Solitaire Minerals Corp. pursuant to their press release of June 22, 2009.

Pursuant to the terms of the LOI, Solitaire Minerals Corp. ("Solitaire") will acquire up to a 75% interest in the Company's Pinaya Gold/Copper Deposit located in southern Peru as well as the Minas Lucho Property and the La Mamita Property for incurring exploration costs totaling US$6,400,000, plus a payment to the Company of US$2,400,000 on or before December 31, 2012. Pursuant to this transaction, the Company will retain a 1.5% net smelter royalty. The final LOI will be subject to regulatory approval, and a final definitive agreement.

The Company also wishes to announce that due to its transaction with Solitaire, it will reduce the number of units offered pursuant to its June 11, 2009 press release, from 40,000,000 Units to 10,000,000 Units. The remaining terms of the placement, as announced, remain unchanged in that these units are being offered at $0.05 per unit with each unit consisting of one common share and one share purchase warrant, with every two full warrants exercisable for one common share at $0.06 per share for a six month period. The proceeds of this private placement will be used for general working capital. There may be a finder's fee payable in relation to this private placement and the same is subject to regulatory approval.

The Company further wishes to announce that Jack Bal and Donald Wedman, P. Eng., have joined its Board of Directors, effective immediately, with the resignations of Victor L. McCall and Don Currie. Mr. Bal is the President of Journey Resources Corp. and Mr. Wedman is the President of CMC Metals Ltd. Both Messrs. Bal and Wedman bring many years of business expertise in public companies, specifically mining companies, to the Company.

This news release was prepared on behalf of the Board of Directors, which accepts full responsibility for its contents.

On behalf of the Board:

Michael C. Scholz, Chairman and Director

ACERO-MARTIN EXPLORATION INC.

Neither the 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: Acero-Martin Exploration Inc. Investor Relations 1-877-646-0067 (604) 646-0640 (FAX) info@acero-martin.com www.acero-martin.com