Sierra Metals Inc.

TORONTO, ONTARIO -- (Marketwire) -- 05/10/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras' or the 'Company') is pleased to report that it has received additional assay results from diamond drill holes #7 through #12 of its drilling program at its 100% controlled Las Coloradas project in the Melchor Ocampo mineral district, Zacatecas

TORONTO, ONTARIO -- (Marketwire) -- 05/09/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB)('Dia Bras' or the 'Company') is pleased to report that representative sampling of rock mined from the Increible deposit, at Dia Bras' 100% owned Bolivar Project, indicates a significant upgrade of copper-silver-zinc grades by screening of mined rock. For

TORONTO, ONTARIO -- (Marketwire) -- 05/06/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') announces that it has not filed its annual Financial Statements for the fiscal year ended December 31, 2010, and the related Management's Discussion and Analysis by the legal deadline of May 2, 2011. The late filing is due to

TORONTO, ONTARIO -- (Marketwire) -- 04/19/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') is pleased to report assay results from the first samples of stream sediment taken at the La Verde high-sulfidation gold prospect of its 100% owned Batopilas Property in Chihuahua State, Mexico. The Batopilas Property is

TORONTO, ONTARIO -- (Marketwire) -- 04/13/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') is pleased to report that sampling of trenches at the San Patricio prospect of its Bacerac Property, Sonora State, Mexico, has yielded more high grades of silver and gold. The trenching and sampling program will be followed by

TORONTO, March 7 /CNW/ --
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TSX Venture Exchange - DIB

TORONTO, March 7 /CNW/ - Dia Bras Exploration Inc. (TSXV: DIB) ('Dia Bras' or the 'Company') is

TORONTO, March 4 /CNW/ --
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TSX Venture Exchange - DIB

TORONTO, March 4 /CNW/ - Dia Bras Exploration Inc. (TSXV: DIB) ('Dia Bras' or the 'Company') is

TORONTO, ONTARIO -- (Marketwire) -- 02/24/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras') (the 'Company') is pleased to report that it has received assay results from diamond drill hole #6 of its current drilling program at the Las Coloradas project in the Melchor Ocampo mineral district, Zacatecas State. Drill hole #6 intercepted

TORONTO, ONTARIO -- (Marketwire) -- 02/24/11 -- Dia Bras Exploration Inc. (TSX VENTURE: DIB) ('Dia Bras' or the 'Company') is pleased to report that continued drilling in support of mine planning at its 11,319 hectare Cusi silver project has returned more significant results, with high-grade intercepts from the Promontorio, Santa Eduwiges and San