Four people arrested in Doncaster and Barnsley on suspicion of murder after a man died are still being quizzed by police today,
A 40-year-old man, a woman aged 37 and two 16-year-old males were arrested in the two towns on suspicion of murder and remain in custody.
Police launched a murder investigation after a man was seriously assaulted by a gang in the Thorpe area of Leeds on Saturday.
The 57-year-old sustained head injuries and died in Leeds General Infimary on Sunday.
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 on 0800 555 111.