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About 1,000 cannabis plants with a potential street value of tens of thousands of pounds have been discovered in Kent.
Police discovered the "factory" when they raided a house in St George's Road in Cheriton, Folkestone.
Officers want to hear from anyone with information about activity at the house, particularly about people and vehicles coming and going from the property.
If you can helpContact police on 01303 850055 or Kent Crimestoppers on 0800 555111 when anonymity is guaranteed and a reward possible.
Residents in the area worried about crime or anti-social behaviour can contact neighbourhood PCSO Mark Ball on 07772 226055.
The signs to look for Anyone suspicious that a property is being used as a cannabis factory should look out for these signs:
Curtains or blinds closed day and night.
Condensation on windows.
Sounds of generators or fans.
Unusual smells.
Air vents being made in walls and roofs.