Provincial police in northeastern Ontario say an investigation into what they're calling a large outdoor marijuana growing operation has resulted in charges against two people, and the seizure of millions of dollars worth of plants.

In a press release issued Thursday, OPP said officers with a number of police units, including the Sudbury organized crime enforcement bureau, and the Espanola detachment, executed a search warrant at a property in the community of Sables-Spanish Rivers Township on Tuesday.

Officers seized 3,100 marijuana plants "in various stages of growth," worth $3.1 million, according to police.

Two Markham, Ont. men — aged 36 and 34 — now face drug production and trafficking charges.

Both of the accused have been released from custody and are scheduled to appear in an Espanola court in November, police said, adding that the investigation into the grow-op continues.