Two dozen kilos of cannabis have been seized by authorities in separate operations.
The first took place in Dublin Port when Customs officials found 16 kilos of herbal cannabis, estimated to be worth about 320,000 euro, in a container that had come off a boat from Spain.
The cargo was labelled mixed goods and the unit had been profiled for X-ray scans.
In the second, eight kilos of the same drug, estimated to have a street value of about 160,000 euro, was found in Dublin Airport by Customs officers and their detector dog Scooby.
The illicit cargo had also arrived in Ireland from Spain.
Investigations are continuing into both seizures, a Revenue spokeswoman said.