Calibre Mining and Centerra Continue to Advance the Siuna Project and Receive Positive Metallurgical Results From Cerro Aeropuerto - Seite 2

The higher grade sample returned 85% after 24 hours and 88 % after 48 hours. This sample includes material from an interval where thin section and SEM analyses has identified free gold and additional tests to evaluate the potential for gravity gold recovery is warranted.

On the Siuna Project in addition to the historic trend highlighted by the La Luz Deposit (past production of 2.3 million ounces gold) and the Cerro Aeropuerto resource (707,000 ounces gold and 3.1 million ounces silver) the results from the Project-wide La Luz soil grid also defined a second gold anomalous trend, the Cerro Coyol - El Tiburon Trend. Within the Northern Siuna area existing gold anomalies include; Montes de Oro, Mina Victoria, Cerro Aza, Roskilete, and others. The current exploration and fieldwork is concentrated on a trenching program targeting geological, geochemical, and geophysical anomalies generated by the work to date. The results of the trenching program will be used to prioritize drill targets which will be tested by an additional 1,600-1,800 metres of diamond drilling to be completed in 2016. Further work, consisting of in-fill soil sampling, rock sampling and trenching, will be completed on high priority targets with the Northern Siuna area.

The La Luz Project is located in the south-west portion of the Borosi Concessions and contains the past producing open pit and underground La Luz Mine that produced 17.1 million tonnes of ore grading 4.14 g/t gold (2.3 million ozs gold) as well as, one kilometre to the south, the NI43-101 compliant Inferred Resource at the Cerro Aeropuerto gold-silver deposit which hosts 707,750 ozs gold and 3.1 million ozs silver in 6.05M tonnes grading 3.64 g/t Au and 16.16 g/t Ag at a cut off of 0.6 g/t (see Calibre News Release dated February 28, 2011).

Notes:	- Mineral Resources that are not mineral reserves do not have economic viability.
	- The quantity and grade of reported inferred resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred resources as an indicated or measured mineral resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured mineral resource category.
	- Resource Estimate for Cerro Aeropuerto detailed in Technical Report titled NI 43-101 Technical Report and Resource Estimation of the Cerro Aeropuerto and La Luna Deposits, Borosi Concessions, Nicaragua by Todd McCracken, dated April 11, 2011.

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.