Police have been given a custody extension of 36 hours to question a 21-year-old man who was arrested on suspicion of murder following the death of another man in Warwick.
Paramedics were called to a property in Blackwell Lane, Hatton park, Warwick, on Saturday at around 11pm.
When they arrived they found a man in his 50s suffering from stab injuries.
He was taken to University Hospital Coventry and Warwickshire, where he later died.
Det Insp Anna Morgan said: “I would like to reassure the community that this incident is being thoroughly investigated.
“We are in the early stages of the investigation but at this stage it is believed to be an isolated domestic-related incident.”
Anyone with any information that may assist the investigation is asked to call police on 101 quoting reference 0346 020515.
To remain anonymous call Crimestoppers on 0800 555 111.