Four arrests were made after a cannabis growing set-up was found during a police raid in Sheffield.
Officers struck on Halifax Road, Wadsley Bridge, on Friday and discovered the drug den.
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Four arrests were made for possession with intent to supply.
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A spokesman for the Sheffield North East neighbourhood policing team said: "If you have or are intending on growing or storing drugs you are probably on our list.
"Have a think about giving it up before we come to your door."
Anyone with information about those involved with drug dealing should call South Yorkshire Police on 101.