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DIA BRAS REPORTS RECENT DEVELOPMENTS AT ITS BOLIVAR PILOT-MINING PROGRAM IN CHIHUAHUA STATE, MEXICO

Montréal, Québec, - July 5, 2006 -

Dia Bras Exploration Inc. (DIB-V) ("Dia Bras or the "Company") is pleased to report recent results for its ongoing development and pilot-mining program at its Bolivar property in Chihuahua, Mexico.

A ramp has been driven from Level 1 to Level 2 to access the down-dip extension of the Brecha Linda, a high-grade zone of zinc-copper mineralization that the Company has been mining since December 2005.  The ramp has accessed high-grade mineralization on Level 2 and development of the zone is in progress.

Another ramp has been driven from Level 6 towards Level 7 with the objective of reaching the chimney-like high-grade Rosario 1, 2 and 3 and Rodolfo Zn-Cu zones approximately 20 meters below Level 6.  Dia Bras has already mined these zones above Level 6.  Another 50 meters of ramp is required to reach Level 7 and the first Rosario zone, and should be completed before the end of July.  These zones continue deeper, as seen in Holes 159 and 168, which intersected the down-dip extensions of Rosario 2 and 3. See figure: Bolivar Mine, Level 6. These samples were assayed by Chemex.

* Previously announced

While driving the ramp past Level 6.5 (1,960-meter elevation), a new zone of massive sulfide ore was encountered, which is 25 meters in length and varies in width from 3 to 5 meters.  A raise being developed in this new zone has passed through 8 meters vertically and is still in ore.  Assay results for three channel samples taken over 2-meter widths have been received and are shown in the table below. These samples were assayed using the AA method at the Company’s lab at its Malpaso mill.

Horizontally, the Rosario 1, 2 and 3 and Rodolfo massive sulfide zones and this new zone extend 170 meters on strike and range from 3 to 10 meters in width.  Starting next week, two of the Company’s underground drill rigs will test the depth extension of this 170-meter strike length of untested high-grade chimneys.

“These results demonstrate the Company’s ability to discover and develop additional high-grade ore for its Malpaso mill during this pilot mining phase of the Bolivar program.  Given the sustained high prices for zinc and copper, the Company expects to maintain its positive cash flow during this pre-feasibility phase of work at the Bolivar property,” stated Dr. Thomas L. Robyn, the Company’s Executive Chairman.

Mr. André St-Michel, engineer and Chief Operating Officer and Executive Vice-President of Dia Bras, is the qualified person within the meaning of NI43-101.

About Dia Bras
Dia Bras is a Canadian mining and exploration company focused on precious and base metals in the State of Chihuahua, northern Mexico. The Company is actively exploring and developing its three key assets – the Bolivar copper-zinc project, the newly acquired Cusi silver mining camp and the Promontorio property – in the world-renowned Sierra Madre mineral belt. The Company trades on the TSX Venture Exchange, under the symbol “DIB”.

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For further information contact:

Thomas L. Robyn
Executive Chairman
(514) 393-8875 ext. 241

or

Nicole Blanchard
Managing Partner
Sun International Communications
(450) 627-6600


The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this press release.

Forward-looking statements: Except for statements of historical fact, all statements in this news release, without limitation, regarding new projects, acquisitions, future plans and objectives are forward-looking statements which involve risks and uncertainties. There can be no assurance that such statements will prove to be accurate; actual results and future events could differ materially from those anticipated in such statements.