Revenue seize 10,000 illegal cigarettes in Cavan late last week.
The consignment was detected by Milo the dog.
The cigarettes arrived from Latvia and a man in his 30s is being questioned over the discovery.
Meanwhile, two parcels of cocaine worth more than €140,000 were discovered in Athlone.
The drugs originated from the Netherlands and were due to be sent to addresses in Louth and Armagh.