Sierra Minerals Inc.

Sierra Minerals Inc.

November 22, 2006 17:12 ET

Sierra Minerals Inc. Extends Warrants

TORONTO, ONTARIO--(CCNMatthews - Nov. 22, 2006) - Sierra Minerals Inc. (TSX:SIM) announces that it has agreed to amend the exercise period attached to the common share purchase warrants which were part of Sierra's $360,000 private placement financing completed on December 6, 2004. Each common share purchase warrant had originally entitled the holder thereof to acquire one Sierra common share at a price of $0.50 up until December 6, 2006. Sierra has agreed to extend the exercise period for a further year up until December 6, 2007 which extension has been approved by the Toronto Stock Exchange. The change is effective as at December 6, 2006.

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