A father-of-five has died after being viciously assaulted in an early morning attack by a man known to him.
The victim, named locally as Liam O'Sullivan (46), was found lying in a pool of blood at a house in Kilkenny city on Thursday.
Emergency services were alerted to the scene at High Hayes Terrace, Castlecomer Road, and rushed him to hospital.
The victim was treated at the intensive care unit in St Luke's General Hospital in Kilkenny, but died at 10.45pm on Thursday.
Detectives arrested a 33-year-old man shortly after Mr O'Sullivan was found and detained him on suspicion of assault causing harm.
He was being questioned under Section Four of the Criminal Justice Act and can be held for a total of 24 hours.
The Herald has learned that the suspect was also hospitalised with injuries to his hands.
He was scheduled to have undergone surgery yesterday morning but this was later cancelled and he was returned to Kilkenny Garda Station for questioning.
Detectives believe the suspect and Mr O'Sullivan were known to each other and were socialising at the property when a row broke out and Mr O'Sullivan was assaulted.
A woman in her 20s, who is well-known to the man in custody, was also arrested as part of the garda investigation.
It is understood she was in the property at the time of the incident.
She was quizzed for a number of hours but was released without charge on Thursday. A file is now being prepared in relation to her for the Director of Public Prosecutions.
Friends of Liam O'Sullivan have paid tribute to the father-of-five on his social media account after he passed away.
One friend wrote: Rest in peace. Such a cruel world we live in... thinking of the kids and family at this heartbreaking time."
The victim was also a friend of Peter Donnelly, who died following an alleged stabbing incident outside the GPO in Dublin last year.
Mr Donnelly was homeless at the time of the incident but was originally from Kilkenny and was close to Liam O'Sullivan.
A post-mortem examination was due to be completed at St Luke's General Hospital yesterday afternoon.
Gardai sealed off the property to allow a forensic examination by specialist officers.
Officers have also been carrying out door-to-door inquiries close to the scene and canvassing the local area for any potential witnesses to the incident.
"A male in his 30s and a female in her 20s were arrested in relation to this incident by investigating gardai," a garda spokesman said.
"The female was released without charge on Thursday, pending a file to the Director of Public Prosecutions.
"The male in his 30s remains in garda custody under the provisions of Section Four Criminal Justice Act 1984, at Kilkenny Garda Station.
"The scene is preserved for a technical examination. The investigation is ongoing and further updates will follow."