Oroco Files Ni-43-101 Technical Report For Cerro Prieto Project

VANCOUVER, BRITISH COLUMBIA –06/16/10 — Oroco Resource Corp. (TSX
VENTURE: OCO) (“the Company”) reports that it has now received the NI 43-101
compliant technical report on the 2009 Exploration Program on the Cerro Prieto project
in Sonora, Mexico supporting the resource calculations reported by the Company on
April 29, 2010. The report has now been filed on Sedar.

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.

Oroco Resource Corp.
Mr. Craig Dalziel
President and CEO