A couple have been arrested on suspicion of money laundering for an international crime and drugs gang.
The man and woman were detained after a series of raids last Saturday across Cork city and county.
About 500,000 euro cash, cars and jewellery, believed to be linked to a drugs smuggling gang with bases in Ireland, Holland and Spain, was recovered.
The couple, both in their 40s, were detained under section two of the Criminal Justice (Drug Trafficking) Act.
They were being questioned in Bandon Garda Station.
A Garda spokesman said the weekend sting was planned as part of an intelligence-led operation to break open the suspected trafficking ring.
Local officers from Cork and Munster were backed up by the heavily armed Regional Response Unit, dog handlers and detectives from the Criminal Assets Bureau.