Cannabis worth an estimated €611,000 has been seized in three locations across Ireland this week.
Two of the seizures were made with the assistance of detector dogs Enzo and Harley.
Revenue said as a result of risk profiling, its officers examined parcels at a premises in Dublin on Thursday.
They found 14.2kg of herbal cannabis with an estimated value of almost €285,000 in parcels which had originated in Thailand and were destined for addresses in Dublin.
In a separate operation on Thursday at a premises in Athlone, Revenue officers examined parcels originating from France and Spain which were destined for Dublin and Galway addresses.
Based on risk profiling and with the assistance of Enzo, they seized 11.8kg of herbal cannabis with an estimated value of €236,000.
In a third separate operation carried out this week, Revenue officers seized 4.5kg of herbal cannabis at Shannon Airport in parcels originating from the USA and destined for Clare, Limerick and Cork addresses.
The seizures were made as a result of risk profiling and with the assistance of Harley, and the drugs have an estimated value of €90,000.
Revenue said the seizures are part of its ongoing operations targeting the importation of illegal drugs.
