Police have seized iilegal tobacco and cash from two shops on Anglesey.
Trading Standards officers also took part in raids on two retailers last week after concerns were raised by local residents.
They were also supported by a specialist tobacco detection dog from WagtailUK.
District Inspector Wayne Francis from North Wales Police said: "The items seized from both premises is a direct result of community information."
"I hope that residents are reassured by the results of the action last week, which keeps potentially harmful products off the streets."
"Investigations are continuing and we thank residents for their ongoing support with the matter."
Detectives have urged anyone with concerns about the sale of illegal produce on the island to conact either North Wales Police, Anglesey Trading Standards or Crimestoppers anonymously.
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