Police found more than 280 cannabis plants, as well as lighting and cultivating equipment, at a house in Gainsborough Road, New Malden, at 8.30am on April 30.
The plants are capable of producing drugs with a street value over £1m. So far no arrests have been made and police inquiries are ongoing. It is the latest alleged drugs factory to be found in the area.
Ten days earlier, 17-year-old Vietnamese Cong Phuong Nguyen was killed when a cannabis factory at a house in Van Dyck Avenue, New Malden, caught fire.
Police are still trying to trace others who fled the fire.
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