Gardai have seized electronic devices and more than 100,000 euro in cash as part of an investigation into suspected terrorism financing.
Three homes were searched by gardai in the south and east regions on Friday as part of the investigation.
The searches were led by the Special Detective Unit, supported by the Garda National Immigration Bureau (GNIB) and local gardai.
The investigation is part of, and being supported by, international law enforcement agencies, including Europol.
Gardai said more than 100,000 euro cash in various currencies has been seized, along with electronic devices and documentation.
The GNIB is investigating the residency status of those involved, adding that they are “non-Irish nationals”.
No arrests were made in the operation and investigations are continuing.