Tributes have been paid to a "gentle, loving" family man who died following an incident at a house in Cardiff.
Dad-of-four Michael Gayle, 54, died at the scene of the alleged assault despite being helped by members of the public and the emergency services.
A 50-year-old woman, who was seriously hurt, remains at the University Hospital of Wales in Cardiff with injuries that are not believed to be life-threatening.
Officers were called to an address in Cypress Crescent in the St Mellons area of the city on Friday evening to reports of a serious assault.
A 21-year-old man, who is known to the victims, was arrested on Newport Road a short time after the incident was reported to the police. He remains in police custody.
Paying tribute to Mr Gayle, his devastated family said: "Michael was a gentle, loving man who doted on his lifelong partner, Amanda, and their four children.
"He was an adoring grandad with the kindest heart, whose smile always lit up the room.
"Michael enjoyed a private life with his family close at all times.
"Michael's way of life did not associate with death - he believed life is eternal.
"Although we will soon be laying him to rest, it was important to him that we know he is forever present and his soul lives on. We take peace from that.
"He spent his life loving, guiding and protecting us. We thank everyone for their heartfelt messages at this difficult time and we appreciate your support."
A South Wales Police spokesman said detectives were continuing to investigate the circumstances of the incident.
"Any witnesses who have not yet given an account to police, or anyone with information which could assist the investigation, is asked to contact 101," the spokesman added.