Atico Resumes Drilling at El Roble Mine, Colombia; Union Negotiations Concluded

VANCOUVER, BRITISH COLUMBIA -- (Marketwired) -- 04/23/13 -- Atico Mining Corporation (TSX VENTURE: ATY)(PINKSHEETS: ATCMF) is pleased to announce that Minera El Roble, current operator of El Roble mine, has reached an agreement with the union workers and mining operations were resumed on Monday April 22, 2013. Atico has re-initiated its diamond drill exploration program.

"We are very pleased that Minera El Roble and the workers union have come to an agreement. With the ending of the strike, Atico has immediately resumed its drill program at the El Roble mine," commented Fernando E. Ganoza, Chief Executive Officer.

Annual General Meeting

Atico Mining cordially invites all shareholders to its Annual General Meeting of Shareholders, at 10:00 am, Tuesday May 21, 2013, at the Four Seasons Hotel, 791 West Georgia Street, 3rd Floor (Aspen Room), Vancouver, British Columbia.

The El Roble Property

The El Roble property is the site of an operating underground copper and gold mine with nominal capacity of 400 tonnes per day. Over the past 22 years the mine has processed 1.5 million tonnes of ore at an average grade of 2.5% copper and an estimated 2.5 g/t gold. Copper and gold mineralization at El Roble occurs as volcanogenic massive sulfide (VMS) lenses. Atico's underground drilling has discovered additional high-grade mineralization below the mine workings. Exploration on the surrounding 6,679 ha property over the past two years has defined a productive contact and an enclosing package of host rocks that extend 10 kilometers across the property. The entire strike length is marked by VMS mineralization occurrence indicators.

About Atico Mining Corporation

Atico is a growth oriented, copper and gold exploration and development company focused on mining opportunities in Latin America. The company's primary property is the El Roble project. The company is selectively pursuing additional acquisition opportunities. For more information, please visit our website at www.aticomining.com.

ON BEHALF OF THE BOARD

Fernando E. Ganoza, CEO

Atico Mining Corporation

No securities regulatory authority has either approved or disapproved of the contents of this news release. The securities being offered have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws, and may not be offered or sold in the United States, or to, or for the account or benefit of, a "U.S. person" (as defined in Regulation S of the U.S. Securities Act) unless pursuant to an exemption therefrom. This press release is for information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of the Company in any jurisdiction.

Cautionary Note Regarding Forward Looking Statements

This announcement includes certain "forward-looking statements" within the meaning of Canadian securities legislation. All statements, other than statements of historical fact, included herein, without limitation the use of net proceeds, are forward-looking statements. Forward- looking statements involve various risks and uncertainties and are based on certain factors and assumptions. 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 include uncertainties relating to interpretation of drill results and the geology, continuity and grade of mineral deposits; uncertainty of estimates of capital and operating costs; the need to obtain additional financing to maintain its interest in and/or explore and develop the Company's mineral projects; uncertainty of meeting anticipated program milestones for the Company's mineral projects; and other risks and uncertainties disclosed under the heading "Risk Factors" in the prospectus of the Company dated March 2, 2012 filed with the Canadian securities regulatory authorities on the SEDAR website at www.sedar.com.

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:

Atico Mining Corporation

Igor Dutina

Investor Relations

+1.604.633.9022
info@aticomining.com
www.aticomining.com