Four people have been arrested on suspicion of murder following an incident at a premises on Middleton Lane in the Thorpe area of Leeds.
A 50-year-old man, a woman aged 37 and two 16-year-old boys were arrested last night (Sunday) from the Barnsley and Doncaster areas.
At 7.23pm on Saturday night police received reports of a disturbance at the premises in Thorpe in which a 57-year-old man was seriously assaulted.
The victim was taken to Pinderfields Hospital before being transferred to Leeds General Infirmary for treatment to head injuries.
He subsequently died in the early hours of the following morning.
All four remain in custody and enquiries are ongoing.
Any witnesses or anyone with any information which could assist officers in their enquiries is asked to contact the non emergency number 101 or Crimestoppers anonymously on 0800 555 111.