Revenue Officers have seized 56,000 cigarettes with a value of almost 30,000 euro at Dublin Airport.
The 'L&M' and 'Marlboro' brand cigarettes were found in the luggage of four Romanians who had arrived on a flight from Istanbul.
The four men, all in their 30s, are due before the Criminal Courts of Justice later.
In a separate operation in Macroom, Cork Gardai and Revenue Officers seized almost €7,000 of unstamped cigarettes and tobacco.
The 'Palace' cigarettes and 'Amber Leaf' tobacco were found in a UK commerical vehicle.
Two men in their 40s from Northern Ireland were arrested, one has since been released.