Suspected herbal cannabis worth about €250,000 was seized in north Co Dublin last night.
Three men were also arrested.
Gardaí from the Organised Crime Unit based at Harcourt Square stopped and searched a van and a car shortly before 8pm last night at Tooman, Lusk.
The operation was part of an ongoing operation targeting the activity of a North Dublin crime gang.
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Three men, all in their 30s, were arrested and are being detained at Swords and Ballymun Garda stations under provisions of Section 2 of the Criminal Justice (Drug Trafficking) Act 1996 as amended.
The suspected cannabis has yet to be analysed.