Mr. Rob McEwen of McEwen Mining reports

MCEWEN COPPER: LOS AZULES - NEW ASSAY RESULTS

McEwen Copper Inc., 52 per cent owned by McEwen Mining Inc., has released the latest assay results from Los Azules, where a continuing infill drilling program continues to delineate copper mineralization in the core of the deposit. Infill drilling serves several purposes: providing better data density to upgrade confidence in the mineral resources, providing material and data for metallurgical, geotechnical and hydrological studies, and potentially defining higher-grade mineralization by drilling inclined holes across vertical structures (such as breccias).

Located in San Juan, Argentina, the Los Azules project has many features comparable with world-class copper-gold deposits in South America, including a thick blanket of higher-grade enriched mineralization.

Highlights:

• Hole AZ22182A intercepted an enriched zone of 231 metres of 0.97 per cent copper (estimated true thickness) and a primary zone with mineralization that remains open at depth.
• Hole AZ23196 returned an overall intercept of 550 m of 0.50 per cent Cu (estimated true thickness) and included 216 m of 0.72 per cent Cu within the enriched zone portion.
• Drilling completed during the current season to April 30 stands at 32,758 metres in 125 holes, having exceeded the 25,000 metres initially planned. Drilling will continue until the end of the field season in May and will resume in October at the end of winter in Argentina.

"It is remarkable to think that 30 per cent of the total number of metres drilled into our Los Azules deposit were completed in the past seven months," commented Michael Meding, vice-president and general manager of McEwen Copper. "It's a credit to our dedicated team from San Juan."

The attached table summarizes recent copper, gold and silver assay results.

Technical information

The technical content of this press release has been reviewed and approved by Stephen McGibbon, PGeo, McEwen Mining's senior consulting geologist, a qualified person as defined by National Instrument 43-101.

All samples were collected in accordance with generally accepted industry standards. Drill core samples, usually taken at two-metre intervals, were split and submitted to the Alex Stewart International laboratory located in the province of Mendoza, Argentina, for the following assays: gold determination using fire fusion assay and an atomic absorption spectroscopy finish (Au4-30) and a 39 multielement suite using ICP-OES analysis (ICP-AR 39); and copper content determination using a sequential copper analysis (Cu-sequential LM-140). An additional 19-element analysis (ICP-ORE) was performed for samples with high sulphide content.

The company conducts a quality assurance/quality control program in accordance with NI 43-101 and industry best practices using a combination of standards and blanks on approximately one out of every 25 samples. Results are monitored as final certificates are received, and any reassay requests are sent back immediately. Pulp and preparation sample analyses are also performed as part of the QA/QC process. Approximately 5 per cent of the sample pulps are sent to a secondary laboratory for control purposes. In addition, the laboratory performs its own internal QA/QC checks, with results made available on certificates for company review.

About McEwen Mining Inc.

McEwen is a gold and silver producer with operations in Nevada, Canada, Mexico and Argentina. In addition, it has large exposure to copper through its 52-per-cent ownership of McEwen Copper, which owns the large, advanced-stage Los Azules copper project in Argentina. The company's goal is to improve the productivity and extend the life of its mines with the objective of increasing its share value and price and providing a yield. Rob McEwen, chairman and chief owner, has personal investment in the company of $220-million (U.S.). His annual salary is $1-million (U.S.).

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