A man has been arrested after a sawn-off shotgun was found in a house in the Cabra area.
The firearm and three rounds of ammunition were found during a planned search by gardaí earlier today.
The operation was carried out by detectives based at Cabra Garda Station and members of the Armed Support Unit.
The man, who is in his 40s, is being held at Finglas Garda Station.
Gardaí say the investigation is ongoing.