Three people who were being questioned as part of the Garda investigation in Waterford and Cork into an alleged plot against a Swedish cartoonist, have now been released from custody.
Seven people in Waterford and Cork were arrested on Tuesday morning and have been questioned since then.
Early this evening a husband and wife from Algeria, who had been undergoing questioning at Dungarvan Garda Station, were released without charge.
At around 8.30pm, a Libyan woman who had been questioned at Tramore Garda Station was also released without charge.
Four others are still being held. Gardaí say files are being prepared for the DPP in relation to the three who have been released.
Their arrests on Tuesday morning were part of an international investigation into death threats against Swedish cartoonist Lars Vilks.
He was threatened over a drawing that depicted the Prophet Muhammad with the body of a dog.