Gardaí seized €400,000 and raided sites in Wexford, Dublin and Meath as part of an intelligence-led operation into money laundering by a feared organised crime gang.
The seizure followed the questioning by gardaí of an Irish man and a Polish national who were parked in a Rosslare lay-by in Wexford with a cattle truck and a car.
Gardaí attached to the National Drugs & Organised Crime Bureau (NDOCB) became suspicious of the duo parked off the N25 and immediately commenced a search of the vehicle.
That led to the discovery of €400,000 in cash.
Both men - an Irishman (53) and a Polish national (35) - were arrested and taken to Wexford Garda Station.
They were being questioned about alleged money-lauding operations contrary to the Criminal Justice, Money Laundering & Terrorist Financing Act, 2010. Both can be detained for up to 24 hours.
Following the discovery of the €400,000, gardaí conducted special follow-up searches at addresses in Swords in Dublin and Trim in Meath.
One garda source said the money is believed to be part of a national operation being conducted by a feared organisation crime gang.
The detection was the result of an intelligence-led garda operation which is understood to have involved lengthy surveillance. Garda chiefs said the operation was "very significant" in the ongoing work of the Special Crime Taskforce.
"Removing the proceeds of crime from those involved in serious and organised crime is a particular priority of the Garda Síochána, in its attempt to dismantle organised crime groups that operate at an international level,” Assistant Commissioner John O’Driscoll said.
"This significant seizure of cash by the NDOCB follows closely after another seizure of a substantial quantity of cash, last week, bringing the total amount of cash seized by that bureau, so far in 2020, to about €1 million.”
Further follow-on raids are expected from gardaí as part of the operation.