Calibre Mining Corp. (TSX VENTURE:CXB) (the "Company" or "Calibre") is pleased
to announce that the Company and IAMGOLD Corporation ("IAMGOLD") have started
the 2014 diamond drilling program on the Eastern Borosi Gold-Silver Project,
Nicaragua. 


Calibre and IAMGOLD entered into an option agreement dated May 26, 2014 whereby
IAMGOLD can earn a 51% interest in the Eastern Borosi Gold-Silver Project
consisting of 176 km2 within the Borosi Concessions, Northeast Nicaragua, by
incurring US$5 million in exploration expenditures and making US$450,000 in
payments to Calibre over 3 years. The total potential investment by IAMGOLD to
earn a 70% interest in the Eastern Borosi Project is US$10.9 million. The
Eastern Borosi Project hosts gold-silver resources in two deposits and a series
of well-defined low sulphidation epithermal gold-silver targets. 


Highlights 



--  Drilling equipment has been mobilized and drilling has commenced on the
    3400 metre 2014 drill program 
--  The 2014 drilling program will comprise an estimated 31 diamond drill
    holes designed to test approximately 3.0 kilometres of strike length of
    previously identified gold-silver bearing structures. 
--  Drilling will test a number of high priority gold-silver targets
    including; Guapinol, Riscos de Oro extension, Blag, California, Veta
    Vancouver, and Veta Toronto.  
--  The current drilling program utilizing one drill rig is expected to take
    three months to be completed.



President and CEO, Greg Smith stated: "We are excited to start the drilling
program on the Eastern Borosi Project. The series of high quality drill targets
represent more than three kilometres of potential gold-silver bearing structures
within the tens of kilometres of potential structures which have been identified
within this prolific district."


Drilling has begun on the Guapinol Gold-Silver Target which has been prioritized
based on previous exploration including; surface mapping, historic underground
development and previous shallow drilling as well as soil and rock geochemistry
and LIDAR surveying. At Guapinol surface channel sampling completed by Calibre
include: 1.3 metres @ 21.0 g/t Au and 13.3 g/t Ag, and 0.9 metres @ 9.6 g/t Au
and 108.0 g/t Ag.


The Eastern Borosi Project includes the Riscos de Oro and La Luna NI 43-101
Inferred Mineral Resources which total 4.70 million tonnes grading 2.31 g/t Au
and 34.99 g/t Ag containing 350,000 ounces of gold and 5.29 million ounces of
silver. Both zones are open for potential expansion. See Calibre News Release
dated May 27, 2014 for details. 


Updated maps detailing the planned drilling program at the Eastern Borosi
Project will be posted on the Company's web site at www.calibremining.com. 


Quality assurance and quality control procedures include the systematic
insertion of blanks, standards and duplicates into the sample strings. Samples
are placed in sealed bags and shipped directly to Acme Labs in Managua,
Nicaragua for sample preparation and then to Acme Labs in Vancouver, Canada for
gold fire assay and ICP-MS multi element analyses. The technical content in this
news release was read and approved by Gregory Smith, P.Geo, President and CEO of
the Company who is the Qualified Person as defined by NI 43-101. 


About Calibre Mining Corp.

Calibre controls a 100% interest in 253 km2 of mineral concessions in the Mining
Triangle of Northeast Nicaragua. Additionally the Company has an option
agreement with IAMGOLD covering 176 km2 of concessions, joint venture
exploration programs underway with B2Gold Corp. on 322.3 km2 of concessions
which includes the Primavera gold-copper porphyry discovery, and has optioned
the 33.6 km2 Rosita gold-copper-silver project to Alder Resources Ltd. Major
shareholders of Calibre include gold producer B2Gold Corp. 


About IAMGOLD Corporation

IAMGOLD Corporation is a mid-tier gold producer with five operating gold mines
on three continents, North America, South America, and Africa and one of the
world's three niobium mines. 


Calibre Mining Corp.

Greg Smith, P.Geo., President and CEO

Neither the 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.


FOR FURTHER INFORMATION PLEASE CONTACT: 
Calibre Mining Corp.
Ryan King
604-628-1012
www.calibremining.com
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