Invecture Announces Expiry of Bid and Take Up of Shares of Frontera Copper

Bryan Nethery, CEO of Frontera Copper Corporation and John Detmold, CEO of 0839073 B.C. Ltd. a wholly owned subsidiary of Invecture Group, S.A. de C.V., and controlling shareholder of Frontera, today jointly announced that since March 4, 2009 an additional 2,915,336 common shares of Frontera have been validly deposited to the offer made by the Offeror to acquire all of the outstanding Common Shares of Frontera.

The Offeror will take up all Common Shares deposited. On completion of this take-up, the Offeror and its affiliates will hold 61,162,125 Common Shares, representing 94.8% of the total outstanding Common Shares, and 93.8% of the Common Shares excluding Common Shares held by the Offeror and its affiliates before the commencement of the Offer.

The Offer will not be extended. The Offeror intends to pursue a compulsory acquisition pursuant to its statutory rights under the Canada Business Corporations Act to acquire the remaining outstanding Common Shares of Frontera. Upon completion of such compulsory acquisition, Frontera intends to apply to de-list the Common Shares of Frontera from the Toronto Stock Exchange.

The Offeror first announced the Offer on December 3, 2008. Pursuant to the Offer (as amended and varied), the Offeror offered to purchase for cash all of the outstanding Common Shares of Frontera at a price of $0.75 per share.