The operation was targeting the sale and distribution of drugs
Gardaí have arrested two men and seized cash, a firearm, ammunition and a quantity of cocaine in Dublin.
The operation was part of ongoing investigations targeting the sale and distribution of controlled drugs in the Ballymun area of the city.
The seizures were made during the search of a house on Thursday night carried out by the Ballymun Drugs Unit, uniformed gardaí and assisted by garda armed units.
Approximately €400,000 in cash was seized along with a firearm, ammunition and a small quantity of cocaine.
A man aged in his 50s was arrested on Thursday in connection with this investigation and is currently detained under the provisions of Section 30 of the Offences Against the State Act.
In a follow up operation, a second man was arrested in the Ballymun area on Friday and is also detained under Section 30 of the Offences Against the State Act 1939 at a Dublin garda station.
The investigation is ongoing.