Revenue officers seized over 540 litres of wine, beer and spirits at Dublin Port over the weekend and this morning.
They discovered the alcohol in a van and two trucks that had disembarked ferries from the UK.
The three drivers, all men in their thirties and forties, have been questioned.
The alcohol seized has a total value of over €6000 and represents a potential loss to the Exchequer of over €3000.
