They seized 130 plants.
Gardaí have found a cannabis 'grow-house' in Dundalk.
Dundalk Drugs Unit, local detectives and uniform Garda members carried out a search of a house on the outskirts of the town earlier today and discovered what they're calling 'a sophisticated cannabis growing operation'.
They've seized 130 cannabis plants and a quantity of cannabis herb, with an estimated street value of €150,000.
A man in his 40s was arrested at the scene and is currently being questioned at Dundalk Garda Station.
Investigations are ongoing.