One of five men arrested after a dissident republican was shot dead in a pub car park has been released without charge.
Gardai said a file was being prepared for the Director of Public Prosecutions (DPP) over the killing of Peter Butterly outside the Huntsman inn, Gormanstown, Co Meath, on Wednesday.
The freed man was aged in his 30s and had been detained by detectives near the pub shortly after the murder.
Four other men, all in their 20s, arrested in a car as it fled the scene remain in custody. The suspects are all being detained under Section 30 of the Offences Against the State Act.
A handgun was recovered following the murder.
Butterly, of Cortown, Togher, Dunleer in Co Louth, was a Real IRA figure and a father of two teenage girls and an infant son.
One line of inquiry was that Butterly was lured to his death as part of a bloody fall-out involving dissident republicans.
He was an associate of a Real IRA boss and convicted criminal Alan Ryan, who was shot dead in north Dublin last year.
Ryan's faction was involved in extortion and intimidation of drug dealers and racketeering against pub and club owners.
Butterly appeared before the non-jury Special Criminal Court last year accused of membership of the Real IRA but was freed on a technicality.