May 21, 2008


VANCOUVER, BRITISH COLUMBIA – May 21, 2008. Oroco Resource Corp. (TSX-V: OCO) is pleased to report on the progress of its Phase One drilling program recently initiated within the area of the past producing Cerro Prieto Mine in Sonora, Mexico.  The 6,000 metre diamond drill program is intended to confirm historical results and test below and beyond the historical workings.

Since the commencement of drilling on April 22nd, three holes have been completed and the fourth is nearing completion for a total of 941 metres drilled.  All three completed holes have intersected the targeted structural zone as shown on the longitudinal section on Oroco's web site:

The first hole drilled, CP001, twinned drill hole SF-11 of the 1998 Morgain Minerals Inc. drill program.  Morgain's drill hole SF-11 returned a 70.1 metre intersection (35.0 metres true width) averaging 2.69 g/t Au, 5.0 g/t Ag, 0.30% Pb, and 1.02% Zn, including a 15.3 metre intersection (7.7 metres true width) averaging 6.81 g/t Au, 9.1 g/t Ag, 0.35% Pb, and 1.16% Zn.  Although assays have not been returned for Oroco's CP001, the thickness of the mineralized zone is comparable to that reported in Morgain's drill hole SF-11.

Oroco's second hole, CP002, intersected the mineralized zone 100 metres northwest of, and 100 metres deeper than CP001.  The third hole, CP003, intersected the mineralized zone 100 metres northwest of, and at the same elevation as CP001.  Both holes intersected significant zones of mineralization (+40 metres apparent thickness).  The fourth hole, CP004, is targeted to intersect the mineralized zone 100 metres northwest of, and at the same elevation as CP003. The drilling is being completed by Canmex Diamond Drilling S.A. de C.V. of Mazatlan and is being supervised in the field by geologist Antonio Montante of San Luis Potosi.

Split core is transported to the ALS Chemex Laboratory in Hermosillo where it is crushed and pulverized, with pulps sent to the ALS Chemex laboratory in Vancouver, B.C. for assaying. Assays for holes CP001, CP002, and CP003 are pending.  Oroco has a standard Quality Assurance/Quality Control program in place to ensure sample security and assay accuracy.

Oroco is a Canadian mineral exploration company which holds a 100% interest in six mineral concessions in Mexico.   The company is initially focused on its Sonora concessions, comprising the Cerro Prieto Mine and the nearby 2,508 hectare Cerro Prieto North concession.   In addition, Oroco holds three mining concessions in the state of Guerrero totaling 293 hectares.

Director Ken Thorsen, BSc Geological Engineering, P Eng, is the company's Qualified Person for the Cerro Prieto Project.   Mr. Thorsen is responsible for the current exploration and development program and has reviewed the content of this release.

Stephen Leahy

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