Revenue officers have seized 7.9 million smuggled cigarettes at Dublin Port.
The contraband arrived into the port on a vessel from Rotterdam in the Netherlands.
The cigarettes were identified in a shipping container said to contain "welding equipment" and "workshop machinery".
The seized cigarettes were 'cheap whites' branded “Business Royals” and “Gold Classic”, with a retail value of more than €4.3m, representing a potential loss to the Exchequer of around €3.4m.
Investigations are ongoing.