Issue of Ordinary Shares upon Exercise of Stock Options

News Release

Orosur Mining Inc.

Issue of Ordinary Shares upon Exercise of Stock Options

MONTEVIDEO, Uruguay, January11, 2011. Orosur Mining Inc. ("OMI" or the "Company") (TSX-V: OMI) (LSE: OMI) announces that, following the exercise of options by employees, today the Company has issued a total of 33,666 Common Shares of the Company (“Common Shares”) at the following exercise prices: 26,000 Common Shares at CAD 0.60 per share; 4,333 Common Shares at CAD 0.61 per share 3,333 at CAD 0.75 per share.

Application has been made for 33,666 new Common Shares to be admitted to trading on AIM (“Admission”). It is expected that Admission will become effective and that dealings will commence on 17 January 2011 in respect of those Common Shares.

On Admission, the Company will have 65,206,555 Common Shares in issue.

ENDS

Neither 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.

About Orosur Mining Inc.

Orosur Mining Inc. is a fully integrated gold producer and exploration company focused on identifying and developing gold projects in Latin America. The Company operates the only producing gold mine in Uruguay (San Gregorio), and has assembled an exploration portfolio of high quality assets in Uruguay and Chile.

The Company is quoted in Canada (TSX Venture Exchange: OMI) and London (AIM: OMI).

For further information, please contact:

Orosur Mining Inc

David Fowler, CEO Ignacio Salazar, CFO + 598 2601 6354; [email protected]

Matrix Corporate Capital LLP

Louis Castro, +44 (0) 203 206 7209 Tim Graham, +44 (0) 203 206 7206

Blythe Weigh Communications

Tim Blythe: +44 (0) 7816 924626 Ana Ribeiro: +44 (0) 7980 321505 Matthew Neal: +44 (0) 7917 800011