The Ontario Provincial Police searched a greenhouse in Kingsville and found $6.1-million in cannabis and equipment.
The search was on Wednesday at a greenhouse in the 800-block of Seacliff Drive.
A large contingent of OPP officers from the Provincial Joint Force Cannabis Enforcement Team, OPP detachments in Essex County and Lambton County, and the OPP Emergency Response Team seized 3,500 cannabis plants, over 640 kilograms of processed cannabis, and marijuana production equipment.
Police did not say if there were any arrests.
The investigation is ongoing. Anyone with information can call the OPP at 1-888-310-1122, Crime Stoppers at 1-800-222-8477, or leave a tip at www.catchcrooks.com.
