Gardaí from the Tipperary division seized €90,000 of heroine near Carrick-on-Suir last night.
In an intelligence led operation, Gardaí stopped a vehicle on the M9 and brought it back to Carrick-on-Suir Garda station for a thorough search, at which time the heroin was discovered.
The seizure is the result of a joint operation between the divisional groups in Tipperary based in Clonmel and Carrick-on-Suir, assisted by detectives from Thomastown.
The driver, a man in his forties, is currently being detained for a drug trafficking offence at Thomastown Garda station.
Detective Inspector, Garda Seamus Maher, explained that it was a significant find for the region.