Image: Revenue Image: Revenue HERBAL CANNABIS WORTH an estimated €1.4 million was seized last Friday in Dublin, Revenue has said. In a statement, it said that officers conducted a search – under warrant – of a premises in the Coolock area of Dublin . With the help of detector dog Robbie, 71kg of herbal cannabis was discovered. The joint operation was conducted by Revenue’s Custom Service and the Garda National Drugs and Organised Crime Bureau. .en.