Calibre and B2Gold Sampling Expands Mineralized Zone at the Minnesota Gold-Copper Project, Borosi Concessions, Nicaragua

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Oct. 7, 2013) - Calibre Mining Corp. (TSX VENTURE:CXB) (the "Company" or "Calibre") is pleased to announce results from a channel sampling program on the Minnesota Gold-Copper Project within the B2Gold Corp. ("B2Gold") (TSX:BTO, BTG:NYSE MKT) Joint Venture on the Borosi concessions, northeast Nicaragua. Calibre controls a 49% interest in the Joint Venture and B2Gold has a 51% interest and is project operator. As announced on September 9^th, 2013 Calibre has executed a Definitive Joint Venture Agreement with B2Gold that grants B2Gold the right to earn an additional 19% in the Borosi concessions joint venture by spending $6 million in additional project expenditures over three years.

Recent Minnesota Project channel sampling assay results include:

Prospect	Channel ID	From (m)	To (m)	Interval (m)	Au (g/t)
Minnesota	MNTR13-001	0.00	7.50	7.50	3.93
Minnesota	MNTR13-002	0	2	2.00	1.01
	MNTR13-002	4.00	14.50	10.50	3.70
	including	5.30	14.50	9.20	4.17
Minnesota	MNTR13-03	0.00	7.00	7.00	1.45

-	Weighted averages calculated using uncut assays.
-	Channel sampling intercepts are sample lengths and further work is required to determine true widths.
-	For channel MNTR13-002 no sampling was completed for 2.0 to 4.0 metres as material had been removed by small miners.

Greg Smith, President and CEO of Calibre stated: "These channel sampling results are very encouraging especially given the consistent nature of the gold mineralization across each of the three channels and the fact that the mineralization is open in all directions. With additional strong channel sampling results along trend and a soil anomaly almost two kilometres in length Minnesota continues to be an exciting gold target."