Police in the region are probing claims that several women were injected with GHB at the Festival Western de Saint-Tite.
Multiple women report they were injected by syringes unaware during the gathering.
The drug is a sedative.
Provincial officers have confirmed an active probe into these incidents.
The authorities are now reviewing the reports made by the women who have come forward.
The police have not given any additional details.
They have not indicated the count of individuals reported the injections.
The investigation is still active.