A local man has been arrested on suspicion of cultivating cannabis in Scarborough.
Police caught him with a watering can, a hose pipe, fans, lights and about 20 cannabis plants.
They had raided a house in Southlands Grove, in the otherwise peaceful and law-abiding suburb of Newby.
The man, 28, was released but is under investigation as police enquiries continue.
The plants and equipment were seized for forensic examination.
The police say people should be aware of the signs of cannabis cultivation, which are:
* A strong and sickly sweet smell.
* Equipment such as lighting and ventilation being taken into a house.
* Constantly-closed curtains, black-out blinds or foil coverings.
* Unsociable coming and going at all hours or neighbours you never see.
* Strong and constant lighting, night and day.
* High levels of heat and condensation; cannabis factories often give off heat and the windows stay misted up.
* The constant buzz of ventilation. A whirring sound can sometimes be heard as growers try to create the ideal climate for plants to grow.
* Lots of power cables. Gangs sometimes dig underground to lay cables that hook up to things like lamp posts so they don’t have to pay for the enormous amounts of electricity they use. They can easily bypass a £20,000 utility bill.
* Landlords or letting agents should be aware of potential tenants who pay a large amount of rent in advance and in cash, go out of their way to prevent you visiting the premises, or offer to improve exterior fortifications.
To report suspicions, dial 101 or ring Crimestoppers anonymously on 0800 555 111.