Revenue officers have seized 30kgs of 'Amber Leaf' tobacco in Shannon and Limerick.
The unstamped tobacco had a retail value of over €15,400, representing a loss to the Exchequer of €12,900.
On Monday 12kgs of tobacco were seized while yesterday officers seized 18kgs of tobacco, following a search of a shop and an adjoining house in Limerick City.
A woman in her 30's was interviewed at the scene.
The seized tobacco was found in packages which had arrived from the Netherlands.
They were destined for addresses in Limerick.