It occurred in the Tullamore area.
Another major drug seizure took place in Offaly this weekend.
Members of the Divisional Drugs Unit raided a house in Tullamore on Saturday afternoon.
Cannabis valued at €20,500 was confiscated during the search and a man was arrested.
Gardai are urging the public to report potential drug dealing in their area to any local Garda station.
Garda Confidential Line 1800 666 111
Tullamore Garda Station 0579327600
Birr Garda Station 0579169710
Portlaoise Garda Station 0578674100