Four people have been re-arrested on suspicion of murder by police investigating the death of a man in Sheffield.
Police were called to a disturbance on Knoll Close in Stocksbridge at 20:36 BST on 12 April and a man was found seriously injured.
Lee Wesson, 34, was taken to hospital but died a few days later.
A woman, 35, a man, 37, and two men both aged 30 were arrested on suspicion of attempted murder and were released on bail. All four have been re-arrested on suspicion of murder and have been re-bailed.
Det Insp Adam Watkinson said the investigation into Mr Wesson's death was continuing "at pace".
"We continue to ask for any witnesses who may have seen the events that evening to come forward
"Any information, no matter how small, could help our investigation."
South Yorkshire Police said a referral had been made to the Professional Standards Department and the Independent Office for Police Conduct (IOPC) in line with normal procedure.
Following assessment, the IOPC referred it back for local investigation, the force said.
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