Detective Sergeant Jason von Tunk, of the Portland police crime investigation unit, said Portland investigators and Heywood and Branxholme uniform officers executed the search warrant at a Lang Street property at 10am on Friday.

"As a result we have located six mature cannabis plants growing in the back yard and two firearms," he said.

"One was a sawn-off shotgun and the other a .22 rifle. A 56-year-old man was arrested and conveyed to Dartmoor police station."

Detective Sergeant von Tunk said the man had an extensive criminal history and was a prohibited person under the Firearms Act.

The man was interviewed and charged with weapon and drug-related offences.

He was released on bail to appear at Portland Magistrates Court on June 15.

Detective Sergeant von Tunk said it was a great effort by joint police units.

"It is great to get those drugs and firearms off the street, making it a safer place for the community,' he said.

"These items were definitely in the hands of the wrong people."

Anyone with drug-related activity information is urged to call Crime Stoppers.

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