If convicted, the individuals could potentially face a life sentence for fentanyl trafficking, which carries a minimum sentence of one year in prison.
Halton Police say they seized 10 kilograms of fentanyl, one kilogram of cocaine, MDMA, and six kilograms of an unknown drug they have yet to identify.
Durham Regional Police say they have responded to 11 overdoses since Thursday involving cocaine, heroin, or fentanyl.
Over 70 kilograms of powder and 120,000 fentanyl pills were obtained in the biggest fentanyl seizure in the history of Ontario law enforcement.
Police in Regina are facing a series of overdoses since recently. They were called out to 14 overdoses over this past weekend with five more on Monday.
Join our mailing list to receive a daily email with all of our top stories