Source: Marlin Gold Mining Ltd.

Oro Mining Commences Drilling at El Compas Project and Announces IR Agreement

VANCOUVER, BRITISH COLUMBIA--(Marketwire - July 13, 2011) - Oro Mining Ltd. ("Oro Mining" or the "Company") (TSX VENTURE:OGR) is pleased to provide the following updates:

Project Update

In addition to the ongoing sonic drilling campaign at its Taunus deposit in Sinaloa, Mexico, Oro Mining has commenced a 2,000-metre diamond drill program at its high grade gold-silver vein hosted El Compas property, located in Zacatecas, Mexico. The objective of this drill program is to increase and upgrade the gold and silver resource base through a combination of infill, expansion, and exploration drilling at the El Compas and El Orito resource areas.

Twelve diamond drill holes are planned at the El Compas and El Orito resource areas. The expansion and exploration drilling will focus on extending known high-grade gold and silver vein structures.

The Company also reports that in addition to the completed purchase of 100% ownership of the El Compas concession, Oro Mining has completed the purchase of certain surface property rights covering 12 hectares of strategically located land sighted for mine ramp access and waste rock disposal. The Company also has a 24-month option to purchase an additional 25.5 hectares of adjacent land suitable for plant construction. "The procurement of surface rights is an important milestone on the development of the El Compas mine as it will allow unhindered mine access for the eventual exploitation of the deposit. We believe that this was a necessary requirement prior to conducting additional exploration activities on the deposit. Now that we own 100% of the concession and have acquired surface rights we will quickly evaluate the regional upside potential," said John Brownlie, CEO of Oro Mining.

Investor Relations Agreement

Oro Mining announces it has engaged Marston Webb International ("MWI") from New York to provide the Company with investor and public relations services. MWI will assist the Company to enhance its profile and convey the Company's key messages. The term of the agreement is for 12 months, renewable upon mutual written consent of the parties. In exchange for the services, MWI will be paid $6,000 per month plus all reasonable out-of-pocket expenses. Victor Webb, President of MWI and the Company are at arm's length. The agreement is subject to acceptance for filing by the TSX Venture Exchange.

MWI is an international investor relations and public relations services agency with three decades of operations and a broad base of clients consisting of gold mining and exploration companies (major and junior), finance, health and technology companies as well as governments, financial exchanges and international media.

About Oro Mining

Oro Mining is a publicly-listed company on the TSX Venture Exchange with properties located in Sinaloa and Zacatecas, Mexico. Oro Mining's corporate mandate is to advance its projects toward production, while continuing to make exploration discoveries on its extensive property position. The district-scale Trinidad property that hosts the Taunus gold deposit continues to be the focus of Oro Mining's exploration and project development activities. The Company's mission is to create exceptional value for our shareholders through exploration discovery, resource growth, mine development and production, while providing sustainable benefits to our staff, the environment, and the communities where we operate.

ON BEHALF OF THE BOARD OF DIRECTORS

John Brownlie, Chief Executive Officer

Some statements in this release may contain forward-looking information. These statements include, but are not limited to, statements with respect to future drilling, exploration, development and production activities. These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the statements.

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

Contact Information:

Oro Mining Ltd.
John Brownlie
Chief Executive Officer
604 646-1580
604 642-2411 (FAX)
www.oromining.com