Gardaí are questioning five men in connection with the murder of a Co Louth man who had links to dissident republicans.
Peter Butterly was shot dead in the car park of a pub in Co Meath yesterday afternoon.
The men have had their periods of detention extended by a further 24 hours.
They are being held at Ballymun, Swords, Ashbourne and Balbriggan Garda Stations.
Gardaí arrested the men within minutes of the shooting.
Four men, all aged in their 20s, were in a car that was intercepted close to the car park of the Huntsman Inn, where the shooting took place. A handgun was also recovered.
The fifth man, who is in his 40s, was arrested a short time later, also close to the pub.
Mr Butterly, a married father-of-three, was shot several times and died at the scene.
Gardaí are examining the possibility that his murder is part of an ongoing feud.
Two of the men being held are from Dublin and known to be involved in dissident republican activity.
Gardaí renewed their appeal for anyone with information on the incident or anyone who was in the area of the Huntsman Inn between 1pm and 2pm yesterday afternoon to come forward.