Five people arrested in Co Longford for money laundering offences have been released without charge.
The four men and one woman, aged in their late teens and 20s, were detained yesterday following searches by local gardaí and officers from the Garda National Economic Crime Bureau.
The five were arrested as part of Operation Skein.
A file will be prepared for the Director of Public Prosecutions.
Operation SKEIN is a GNECB investigation into a criminal organisation involved in worldwide invoice redirect frauds and the subsequent laundering of the proceeds of these crimes through bank accounts in Ireland.
To date, it is estimated that this criminal organisation have stolen over €15.5 million and laundered almost €14 million in Ireland.
Around 78 people have now been arrested who are connected to this criminal organization, gardaí have said.
