First Gold Showing on Pontax, Work in Progress on Cheechoo

MONTREAL, QUEBEC–(Marketwire – July 5, 2010) – SIRIOS RESOURCES INC. (TSX VENTURE:SOI) announces the discovery of the first gold showing in the northern portion of the silver and gold PONTAX property. In the first series of 21 rock grab samples assayed in June 2010, a sample yielded 11.6 g/t in gold and 42.7 g/t in silver. The sample, collected during regional prospecting, comes from a quartz vein of less than 30 cm in thickness. These are preliminary results.

This new gold showing is in addition to the silver-zinc zone located 10 km further west and discovered in 2006 by SIRIOS which shows at some places very high silver grades reaching up to many kg per tonne of silver.

During the 2010 June prospecting program, close to 175 rock grab samples were collected and shipped to the ALS CHEMEX laboratory in Val d’Or for gold (AA23) and 45 elements (AA45) assaying. Final results are expected within the next few weeks.

Prospecting for precious metals (silver and gold) was undertaking on the northern portion of the property, which includes a group of around 50 claims that were acquired last year and covered by an airborne magnetometric survey completed last winter. This region of the property borders the Anatacau – Wabamisk property of Virginia Mines (TSX: VGQ), who announced drilling results last April that included a section yielding up to 46.5 g/t Au (uncut grade) over 4 metres on the Isabelle showing.

FIELDWORK IN PROGRESS ON CHEECHOO (Opinaca area – Éléonore):

SIRIOS along with partner Golden Valley Mines (TSX-V: GZZ) have begun a soil sampling program on the property as well as a magnetometric ground survey. These surveys, which will be followed by a prospecting and mapping program in mid August, are located in the area bordering the Eleonore South project currently held and explored by Goldcorp, Eastmain and Azimut. Those companies recently announced the start of a $1.6M drilling programme aimed to test the targets located in close proximity to the CHEECHOO and Eleonore South borders.

This press release was prepared by Dominique Doucet, P. Eng., President of SIRIOS, Qualified Person pursuant to National Instrument 43-101.