Gardaí in Limerick are continuing to question two men and a woman in connection with "serious crime" in the city.
The men were arrested on Saturday night and are believed to have close links to an ongoing feud. The woman was detained last night.
Gardaí have arrested 12 people since last Thursday in counties Kildare, Tipperary and Limerick in connection with the alleged abduction of brothers Eddie and Kieran Ryan in January and the subsequent gangland execution of 36-year-old Kieran Keane.