Gardaí have seized 400 cannabis plants following the planned search of a premises in Kilbeggan, Co Westmeath earlier today.
The drugs are believed to have a potential street value of €160,000.
A 34-year-old man has been arrested and is being detained at Naas Garda Station.
In a follow-up search in Rathangan, Co Kildare, equipment used in the cultivation of cannabis were also seized by gardaí.