UPDATE: Two men questioned about the murder of Peter Murphy in north Cork over four years ago have been released without charge.
The two men were arrested yesterday morning.
Peter Murphy, originally from Castletownroche, was found dead at his rented home in Shanavoher, near Bweeng, in February 2015.
He died from head injuries.
Five people were subsequently arrested but nobody was ever charged with the killing.
Yesterday, two men in their 20s were arrested and taken to Mallow garda station for questioning.
They were being held under Section 50 of the Criminal Justice Act, 2007.
They have now been released without charge and a file is being prepared for the Director of Public Prosecutions.
Speaking at Mallow Garda Station, Superintendent William Duane said "Gardaí continue to investigate the murder of Peter Murphy at his home in Shanavoher. We would like to thank the members of the community for their assistance to date but we are still appealing for anyone with information to come forward. Anyone who knows anything surrounding this investigation is asked to contact us at Mallow Garda Station 022 31450, The Garda Confidential Line 1800 666111 or any Garda Station.”