Six properties have been searched by the Lancashire police since 12:15pm yesterday, November 16.
A large cannabis farm was uncovered at a property on Christ Church Street, Preston, at around midday yesterday after the police executed a search warrant.
Since then, groups of officers have continued to search homes at five other addresses across the city in a bid to stop the growth of the class B drug.
Video shows man in van wielding weapon in Preston city centre fight
Dramatic reduction in speed limit on major route into Preston through South Ribble
Lewis Turner inquest: moped rider "travelling at motorway speeds" on residential New Longton road and without fastened helmet before fatal crash
Real Housewives of Cheshire: former star of hit TV show set to visit Chorley boutique
Lancashire Police investigate after man found critically injured outside Preston’s Harris Museum
Addresses at Jemmett Street, Otway Street, Eldon Street and Trafford Street were also searched as part of the operation.
More than 700 plants, along with electrical and lighting equipment have been seized.
Police were seen breaking through barricaded windows and carrying out drug paraphernalia at the terraced house on Christ Church street at 3pm this afternoon.
A spokesperson for the Lancashire police said: "At around 12.15 pm yesterday, we executed a warrant at an address in Christ Church Street in Preston.
"A significant cannabis set up was found at the scene.
"Officers have since carried out further searches at addresses in Jemmett Street, Otway Street, Eldon Street and two addresses in Trafford Street.
"More than 700 plants, along with electrical and lighting equipment, have been seized."
Thanks for reading. If you value what we do and are able to support us, a digital subscription is just £1 per month for the first two months. Try us today by clicking here