Appoints Seymour Pierce as Joint Broker

                                                                                                              News Release 

Orosur Mining Inc.

Appoints Seymour Pierce as Joint Broker

SANTIAGO, Chile, June 1, 2012. Orosur Mining Inc. ("OMI" or the "Company") (TSX: OMI) (LSE: OMI) a South American-focused gold producer and explorer, today announces that is has appointed Seymour Pierce as Joint Broker with immediate effect.

ENDS

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.

.

For further information, please contact:

Orosur Mining Inc

Ralph Browning, Chairman David Fowler, CEO Ignacio Salazar, CFO + 56 2 9246800;[email protected]

Canaccord Genuity Limited (Nominated Adviser & Joint Broker)

Rob Collins / Andrew Chubb +44 (0) 20 7523 8000

Seymour Pierce (Joint Broker)

Stewart Dickson / Jeremy Stephenson +44 (0) 20 7107 8000

Blythe Weigh Communications (Investor Relations)

Tim Blythe: +44 (0) 7816 924626 Susan Mckenzie: + 44 (0) 7919 050828 Robert Kellner: +44 (0) 7800 554377