Revenue officers seized almost 10,000 litres of vodka and whiskey at Rosslare Europort on Friday.
During routine operations, the alcohol was discovered in an unaccompanied trailer that had arrived on a ferry from Cherbourg in France.
The smuggled alcohol is thought to be worth more than €300,000, representing a potential loss to the Exchequer of over €230,000.
Separately on Thursday as part of an intelligence led operation, Revenue officers seized almost 400 litres of spirits, beer, and wine when a premises was searched, under warrant, in Roscommon.
The alcohol, with an estimated retail value of over €2,400, represents a potential loss to the Exchequer of over €1,420.
A man and a woman, both in their 30s, were questioned.
Investigations into these seizures are ongoing.
These seizures are part of Revenue's ongoing operations targeting the shadow economy and smuggling. If businesses, or members of the public, have any information regarding smuggling, they can contact Revenue in confidence on Confidential Phone Number 1800 295 295.
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