Provincial police has seized more than $22 million worth of illegal cannabis from properties in St. Catharines and Vineland, Ontario, according to authorities.

Ontario Provincial Police (OPP) said in a press release Tusday that on Oct. 14 the Provincial Joint Forces Cannabis Enforcement Team (PJFCET) executed two search warrants at two greenhouses and two residences in the Niagara Region.

As a result of the investigation, 21,000 illegal cannabis plants and more than 181 kilograms of processed illegal cannabis were seized, OPP cited. Investigators estimate that the total value of the cannabis seized is over $22 million.

Authorities are asking anyone with information related to the investigation to contact the police or Crime Stoppers, CP 24 reported.

Six suspects are now facing charges under the Cannabis Act in connection with the investigation, including residents from Toronto, Scarborough, and St. Catharines.

The suspects are set to appear in a St. Catharines courtroom on Dec. 23.