Investigations are ongoing.
Nine million cigarettes were seized at Dublin Port on Friday (13 May), with an estimated value of €6.8 million.
The discovery was made as a result of routine profiling, and with the assistance of a mobile X-Ray scanner and Waffle, the detector dog.
The consignment of illegal cigarettes branded "Lambert & Butler" represented a potential loss to the Exchequer of approximately €5.3 million.
Investigations are ongoing.
Revenue is asking businesses or members of the public to share any information they may have regarding smuggling.
Those with information can contact Revenue in confidence via the free phone number, 1800 295 295.
