An AK-47 assault rifle was seized by gardaí during a search in the Finglas area of north Dublin on Friday evening.
The search operation was carried out by the District Drugs Unit in Finglas with assistance from a number of local units.
During the operation, the AK-47 was located at the scene along with cannabis valued at approximately €12,000.
The firearm and drugs will now be sent for analysis to the Garda Ballistics Unit and Forensic Science Ireland respectively.
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Gardaí said no arrests were made but investigations were ongoing.