The Famatina valley - Update !!!

The Famatina valley - Update !!!

January 30, 2012

OSISKO UPDATES STATUS OF FAMATINA EXPLORATION PROJECT

(Montreal, January 30, 2012) Osisko Mining Corporation (the “Corporation” or “Osisko”) (OSK: TSX, EWX: Deutsche Boerse) in response to recent community protests and media reports and requests regarding Osisko’s activities in La Rioja State, Argentina, would like to provide an update regarding the company’s current and planned involvement in the Famatina Project.

On August 31, 2011, Osisko and Energía y Minerales Sociedad Del Estado (“EMSE”), the La Rioja State mining corporation announced that they had signed an agreement regarding the Famatina Project (the “Agreement”). (See press release: http://www.marketwire.com/press-release/osisko-and-emsesign- agreement-for-development-of-famatina-project-in-argentina-tsx-osk-1555790.htm.)

An exploration project – not a mining project

The Famatina Project is located near Famatina and Chilecito, towns of respectively 6,500 and 50,000 people (including surrounding areas) in the northern part of the state of La Rioja. The mineral rights to Famatina are held by EMSE. At this point in time Famatina is an exploration project only; there is no current plan, design or intent for any mining operations. Osisko has committed to spend $10 million, including environmental baseline studies, during the initial year of a 4-year term. Osisko intends to execute the agreement through its subsidiary Minera El Portal S.A. (“MEP”). Osisko’s partner in the project, EMSE, is responsible for gaining all required permits through the life of the Famatina Project.

Osisko, in all its endeavors, is committed to socially and environmentally responsible exploration and development, and is dedicated to performing its work programs to the highest international standards of acceptance.

The Famatina Project is still in its organizational stage, and Osisko has made no significant financial investment in the project to date. Osisko, through its subsidiary MEP has not conducted, nor has it attempted to conduct, any field work on the Famatina Project.

MEP representatives have started to design and prepare a community information and consultation program. This information and consultation is primary to the commencement of any exploration work on the site. If there is no social license for exploration and development around the Famatina project area, no work will be conducted by MEP.

Protests

In the days immediately following the signature of the Agreement, groups from Famatina and elsewhere in Argentina commenced organized protests against what has misleadingly been called the “Famatina mega-mine project”. In fact, the development of a mine is still highly hypothetical, since very little is known about the amount, quality and location of the mineral resources that may exist in the properties within the Famatina Project. The environmental regulations of Argentina and the best practices policy of Osisko ensure that even if future exploration was to prove successful, there are many checks and balances in place that would ensure a thorough and lengthy review process prior to any potential mine permit being granted.

Road Block

On January 2, protesters obstructed access to the Famatina Project site. As of today this blockade is still in place, and demonstrations have been staged in Famatina, La Rioja City and elsewhere in Argentina. Although this obstruction has not had any impact on field work, the protest activities have impeded MEP representatives in their efforts to make initial contacts with people living in the vicinity of the Famatina Project as part of the community information program for planning and preparation.

Osisko believes that factual information about mineral exploration in general and about this project specifically would reassure Famatina residents regarding environmental impact, as well as potential economic benefits to the community and state. Osisko fully supports the government of La Rioja and EMSE in this endeavor.