Cigarettes worth more than 11,000 euro have been seized by customs officials in Cork.
The 24,400 Marlboro Gold branded cigarettes were recovered when officers, acting on a tip off, swooped on a man on board a flight from Poland.
Around 18,000 cigarettes were discovered when they stopped the non-Irish national disembarking the flight from Warsaw at Cork airport.
A further 6,400 cigarettes were found during a follow up operation at an address in east Cork.
The haul could have lost the exchequer around 9,000 euro in unpaid taxes.
In a statement the Office of the Revenue Commissioners said: "Investigations are ongoing with a view to prosecution."