A man and three women have been arrested by Gardaí suspected of financing terrorism.
The arrests were made on Tuesday morning as part of an ongoing investigation by the Special Detective Unit, the Garda National Economic Crime Bureau and Security & Intelligence.
The operation was looking into international terrorist financing.
Six searches were conducted in the Dublin area.
Documents, electronic equipment and €4,500 in cash was seized.
The four people were arrested for suspected terrorist financing, and are being held under Section 4 of the Criminal Justice Act.
The arrested persons are a man, aged in his 40s, and three women - aged in their 30s, 40s and 60s.
Gardaí have said the investigation is on-going.