Mr. Mick Wilkes reports

OCEANAGOLD DECLARES COMMENCEMENT OF COMMERCIAL PRODUCTION AT THE DIDIPIO MINE IN THE PHILIPPINES

OceanaGold Corp. has begun commercial production at the Didipio mine located in Luzon, Philippines. The board of directors has reviewed the monthly operating metrics and cost profile and has determined that the effective date of commercial production is as at April 1, 2013. All revenues and operating costs will be reported to the income statement from that point.

Mick Wilkes, managing director and chief executive officer, commented: "We are extremely pleased to formally announce the declaration of commercial production at Didipio with an effective date of April 1, 2013. This marks the official start to a very important chapter for OceanaGold as we transition into a multinational gold producer. Since construction commenced in June, 2011, the OceanaGold team has worked hard to deliver on its commitments to our stakeholders over the past 22 months, and on behalf of the board of directors, I would like to thank our OceanaGold team members for their tireless commitment to making this mine a reality. We have successfully progressed from first ore in the mills to commercial production in just over three months, which is a great accomplishment and a testament to the skill of the construction and commissioning teams, resulting in the seamless transition to our equally talented operations team. To date, more than 22,000 tonnes of copper gold concentrate has already been produced. I'd also like to personally acknowledge our government and community partners for their ongoing support and contributions towards this achievement."

Official opening

The board of directors officially opened the Didipio mine on May 15, where approximately 500 guests and dignitaries from the local communities and provinces attended the official ceremony. The day included numerous cultural performances from local children groups, award recognitions and tours of the mine for the invited guests.

Production guidance

The company has reviewed production guidance for 2013, taking into account commercial production at Didipio, commencing on April 1, 2013. Guidance remains unchanged.

                                    GUIDANCE

Didipio        50,000-70,000 ounces Au and 15,000-18,000 tonnes Cu at
               cash costs of negative $370 (U.S.) to negative $50 (U.S.) per ounce 
              (net of byproduct credits)
New Zealand    235,000-255,000 ounces Au at cash costs of $880 (U.S.) to $950 (U.S.) per ounce  
Total          285,000-325,000 ounces Au at cash costs of $650 (U.S.) to $800 (U.S.) per ounce
              (net of byproduct credits)

We seek Safe Harbor.