A 53-year-old man has been arrested on suspicion of murder following the death of a man from Cardiff.
Police say they were called to an address in the Llanrumney area of the city in the early hours of this morning.
The 24-year-old man was taken to the University Hospital of Wales, where he later died.
I would like to reassure the community that a full police investigation is currently underway. We will utilise our extremely strong community links to fully understand the events that led to this tragic death.
Police are appealing to anyone who has any information to contact South Wales Police on 101 or Crimestoppers anonymously on 0800 555 111.
More top news
Wintry showers to continue through the weekend and warnings of gales
Exclusive figures given to ITV Cymru Wales show a steep rise in the number of people seeking advice for steroid use.
Cold, breezy and generally cloudy at first with further wintry outbreaks on the hills