€400,000 in cash, cocaine, a gun and ammunition have been sezied by Gardai in Ballymun.
The seizures were made during the planned search of a house last night.
Two men, one of them in his fifties, have been arrested.
In a separate search, cannabis thought to be worth over a quarter of a million euro has been seized at Dublin Airport.
The drugs were found hidden in the luggage of a Malaysian man who arrived on a flight from Madrid.
Revenue says investigations are ongoing with a view to prosecution.