Orosur Mining Inc Announces Change of Nomad and Broker

MONTEVIDEO, Uruguay, August 8, 2011 – Orosur Mining Inc. ("OMI" or the "Company") (TSX VENTURE: OMI) (LSE: OMI) is pleased to announce the appointment of Canaccord Genuity Limited as its Nominated Adviser and Broker with immediate effect.

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]

Canaccord Genuity Limited (Nominated Adviser & Broker)

+44 (0) 20 7050 6500 Bhavesh Patel Ryan Cohen

Blythe Weigh Communications (Public Relations and Investor Relations)

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