OROCO SECOND PHASE DRILLING VERIFIES 2.0 KILOMETER MINERALIZED STRUCTURE

VANCOUVER, British Columbia � (September 17, 2009) Oroco Resource Corp. (TSX-V:
OCO) (�Oroco� or �the Company�) is pleased to announce the progress on and results from
its Cerro Prieto Project in Sonora State, Mexico.

Since beginning the Phase 2 drill program on August 9th, 2009, the two drills have completed
approximately 2000 meters of drilling in ten holes. Six of the holes have been drilled
immediately to the north of the 2008 Phase 1 drill locations at 100 meter intervals along strike
and to depth with the intent of adding resources in the oxide zone. The remaining four drill
holes have been completed on the claims optioned from Yamana Gold Inc. further north along
strike with the objective of extending the overall length of the Cerro Prieto mineralized
structure.

Drill hole locations plotted on a longitudinal section of Cerro Prieto may be viewed at
orocoresourcecorp.com/projects-Cerro-Prieto-Project-Maps-and-Sections.html.

Highlights of the Phase 2 drilling to date include:

1. All holes completed to their target depth have intersected a strongly mineralized zone,
   therefore establishing a drilled strike length of two kilometers;
2. CP025 intersected 53.1 meters of mineralization with greater than 1% zinc and
   anomalous gold, silver and lead values;
   
3. CP026 intersected 15.6 meters with 0.324 g/t Au and 65.2 g/t Ag including a 6.2 meter
   section with 0.686 g/t Au, and 156.2 g/t Ag;
4. CP027 intersected a 13.5 m section averaging 0.826 g/t Au and 10.2 g/t Ag including a
   3.1 meter section with 2.777 g/t Au and 26.2 g/t Ag; and
   
5. CP029 intersected 7.0 meters averaging 1.464 g/t Au including 1 meter that assays
   9.070 g/t Au.

CP025 was drilled under 2008 holes CP020 and CP021 which both intersected sections of
highly anomalous mineralization. The paucity of gold and silver and abundance of base metals
points to the vertical zoning of the deposit.

CP026 was drilled 100 meters north along strike of the section with CP025 and intersected the
zone approximately 100 meters below surface.

CP029 was drilled to intersect the mineralized zone 100 meters below CP026.

CP027 was drilled 100 meters north along strike of CP026 and also intersected the zone
approximately 100 meters below surface.

CP028 was drilled under very high surface samples on the Yamana option as outlined in
Oroco�s press release dated August 11, 2009. The hole failed to intersect the target because of
poor drilling conditions and was redrilled as CP030.

Assays have been received for four holes and the highlights are presented in the following table.

Significant Intersections from Cerro Prieto Phase 2 Drill Results

Oroco is pleased that the results verify that the mineralized zone extends to the north and
maintains a significant thickness. The drilling completed in 2008 enabled the company to
complete a resource estimate from line 150N to line 750N (a distance of 600 meters) and
identified the mineralized zone in drilling as far north as line 1050N in step out hole CP023.
Visual results from the holes drilled on the ground optioned from Yamana also indicate that the
faulting, shearing and brecciation that characterize the zone are all present through line 2150N.

The mineralized zone has now been identified in drilling over a total distance of two kilometers
and is still open, within a 17.5 kilometer strike length, in both directions.

About Oroco
Oroco is a Canadian-based mineral exploration company with its primary focus on the
accelerated development of the gold bearing oxide zones of its Cerro Prieto project, a
polymetallic (Au-Ag-Pb-Zn) project in Sonora State, Mexico.

The Cerro Prieto project consists of the 100% owned, 2,723 ha, San Felix, San Francisco and
Cerro Prieto concessions and the 4,120 ha of the connecting Argonauta 5 Fraccion 1 concession
to which the Company holds an option to purchase (see May 14, 2009 news release). During
the first field season in 2008, the Company drilled 5,975 meters of core and tabled a NI 43-101
compliant resource estimate together with the results of a preliminary metallurgical study (See
May 11, 2009 news release). The Company is moving the Cerro Prieto project forward with the
rapid development of mineral resources, further metallurgy studies and the development of a
preliminary assessment by an independent mining engineering firm.

Qualified Person
Kenneth R. Thorsen, B.Sc., P. Geo., is a director of the company and is a 'qualified person' for
the purposes of National Instrument 43-101 Standards of Disclosure for Mineral Properties of
the Canadian Securities Administrators. He has verified the data (including sampling, analytical
and test data) and prepared or supervised the preparation of the information contained in this
news release.

Quality Assurance & Control
The Company has implemented a quality assurance and control (QA/QC) program to ensure
sampling and analysis of all exploration work is conducted in accordance with the best possible
practices. 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. The other half of the core is retained for future assay verification. The QA/QC policy
includes the chain of custody monitoring, insertion of blanks, standards and duplicates in the
initial samples submitted. The laboratory provides an additional internal control program.

OROCO RESOURCE CORP.
789-999 West Hastings Street, Vancouver, BV V6C 2W2
T: 604.688.6200 F: 604.688.6260
www.orocoresourcecorp.com

For further information, please contact:
Mr. Craig Dalziel, President and CEO
Oroco Resource Corp.
Tel: 604-688-6200
www.orocoresourcecorp.com

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.