Revenue officers seized cigarettes worth an estimated €1.4 million at Dublin Port on Wednesday.
The seizure was the result of routine profiling and was carried out with the assistance of a detector dog named Waffle.
More than 1.9 million cigarettes were seized.
The consignment of illegal cigarettes, which were branded “Manchester”, had an estimated retail value of €1.4 million, representing a potential loss to the Exchequer of about €1.1 million.
Mark O'Connell: The mystery is not why we Irish have responded to Israel’s barbarism. It’s why others have not
Afghan student nurses crushed as Taliban blocks last hope of jobs
Emer McLysaght: The seven deadly things you should never buy a child at Christmas
‘No place to hide’: Trapped on the US-Mexico border, immigrants fear deportation
Revenue said the seizure was part of its ongoing operations targeting the shadow economy and the supply and sale of illegal tobacco products.
“If businesses, or members of the public, have any information regarding smuggling, they can contact Revenue in confidence on free phone number 1800 295 295,” it added.