Calibre Mining Announces Expiration of 44 Million Warrants

VANCOUVER, BRITISH COLUMBIA--(Marketwire - July 18, 2011) - Edward Farrauto, President and CEO of Calibre Mining Corp. (TSX VENTURE:CXB) (the "Company" or "Calibre") announces the expiration of 44,310,510 unexercised share purchase warrants on July 16, 2011. The warrants were originally issued in connection with the Company's private placement announced on July 16, 2009 and had an exercise price of $0.20 per common share. The Company presently has 131,965,918 common shares issued and outstanding. As a result of the expiration of the warrants, the Company's fully diluted position would be 162,580,251 common shares, which would result in a fully diluted working capital position of approximately $11.9 million (assuming all options and warrants presently outstanding were exercised).

Calibre Mining Corp. is a TSX Venture Exchange listed company (TSX VENTURE:CXB) that is focused on the acquisition, exploration and development of gold and silver deposits in Central America. Major shareholders of Calibre include gold producer Yamana Gold Inc. and investment fund Sun Valley Gold.

Calibre Mining Corp.
Signed "Edward Farrauto"

Edward Farrauto, CGA
President and CEO

Cautionary Note Regarding Forward Looking Statements

Safe Harbour Statement under the United States Private Securities Litigation Reform Act of 1995: Except for the statements of historical fact contained herein, the information presented constitutes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements including but not limited to those with respect to the price of gold, silver or copper, potential mineralization, reserve and resource determination, exploration results, and future plans and objectives of the Company involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievement of Calibre Mining Corp. to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. There can be no assurance that such statements will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.