Ontario Provincial Police have busted an indoor marijuana grow operation after responding to a call of a break-in in Lanark County.

The OPP drug enforcement unit says they seized 1,387 plants with an approximate street value of $1.3 million.

Three people have been charged with production of marijuana following the incident.

Thirty-five-year-old Nhat Thi Huyhn, forty-year-old Dung Van Nguyen and 20-year-old Cuong Van Pham were all charged with production of marijuana and other drug related offences.

Three males were charged in relation to the break-in which occurred late Monday afternoon.

Police are continuing their investigation.