Drugs with an estimated street value of €750,000 have been seized as a result of an ongoing garda operation targeting the sale and supply of drugs in the North Dublin Area.
The Coolock Drugs Unit searched a house in the Greenwood Estate, Coolock, shortly after 5.30pm.
Approximately 3.5kg of heroin was seized as was a small amount of cocaine and other drug paraphernalia.
A 22-year-old man was arrested at the house and is being detained at Coolock Garda Station.