Sierra Metals Inc.

MONTREAL, QUEBEC -- (Marketwire) -- 09/09/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') is pleased to announce that it has commenced a 1,000 to 1,500 metre drill program at the Las Coloradas project in the Melchor Ocampo district of Zacatecas, Mexico. The Company controls five concessions covering approximately

MONTREAL, QUEBEC -- (Marketwire) -- 08/31/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') is pleased to report that drilling has commenced at its La Cascada target, which is a high-sulphidation gold system at the Company's 100% owned Bolivar Property in Chihuahua, Mexico, which is not subject to any royalties

MONTREAL, QUEBEC -- (Marketwire) -- 08/30/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') ('the Company') announces the results for the three and six-month periods ended June 30, 2010. All currency in this release is in Canadian dollars unless otherwise indicated. For a full explanation of results, the unaudited Interim

MONTREAL, QUEBEC -- (Marketwire) -- 08/25/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that a major geophysical survey has been completed on its 100% owned Bolivar Property which is not subject to any royalties, Chihuahua State, Mexico. Field checks have been conducted to examine anomalies detected during a recently

MONTREAL, QUEBEC -- (Marketwire) -- 08/23/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that its 240-m-long underground development drift has reached the El Gallo deposit at the Bolivar Property in Chihuahua State, Mexico. Development towards this deposit began from the San Francisco zone of the Bolivar Mine, which is to

MONTREAL, QUEBEC -- (Marketwire) -- 08/16/10 -- Dia Bras Exploration Inc. ('Dia Bras') (the 'Company') (TSX VENTURE: DIB) announces that it will be seeking approval by its shareholders of a special resolution authorizing the consolidation of all of the Company's issued and outstanding common shares (each, a 'Common Share') on the basis of a ratio

MONTREAL, QUEBEC -- (Marketwire) -- 08/04/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that drilling in support of mine planning at its Cusi silver project is returning significant results, with more high-grade intercepts from the Promontorio, Santa Eduwiges and San Juan mines, plus elevated gold grades from San Juan

MONTREAL, QUEBEC -- (Marketwire) -- 07/19/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that its subsidiary, Dia Bras Mexicana, S.A. de C.V., has received final approval for a thirty-six month term loan of 33 million Mexican Pesos (MXP), about US$2.6 million, from Fideicomiso de Fomento Minero (FIFOMI), a branch of the

MONTREAL, QUEBEC -- (Marketwire) -- 07/15/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that advanced development at its Cusi silver project is being accelerated, with expanded drilling at the Promontorio mine and new drilling at the San Juan mine leading to mine planning. Both mines are being prepared for pilot-mining

MONTREAL, QUEBEC -- (Marketwire) -- 07/14/10 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) is pleased to report that a broad area of copper-zinc mineralized skarn, known as 'Los Americanos North', is located only one kilometre from its new Piedras Verdes Mill site, which is under construction and scheduled for commissioning in early 2011. By