Two men, aged 40 and 44, were due in court yesterday after being charged with the murder of a 43-year-old man in Barnsley earlier this week.
He was found seriously injured in a house on Pinder Oakes Cottages, Measborough Dike, on Monday and died in hospital two days later.
Officers found the injured man after a 44-year-old man attended Kendray Hospital with serious head injuries.
Enquiries into his condition led them to the other injured man.
There have been 19 other murder investigations launched in South Yorkshire since the beginning of the year.
Anyone with information about any of the deaths should call South Yorkshire Police on 101.
9. Paul Crossley
Paul Crossley, 53, died on May 19 - four days after suffering a head injury during an altercation between a group of men on Longley Hall Way, Longley, Sheffield. Sean Holt, 43, of and Richard Ferrie, 44, both of Longley Hall Way, have been charged with murder. Photo: Claire Lewis
10. Amanda Sedgwick
Amanda Sedgwick, 49, was found dead at a property in Manor Way, Askern, Doncaster, on May 19. A 48-year-old man arrested on suspicion of murder has since been released under investigation while enquiries continue. Photo: Claire Lewis
11. Michelle Morris
Michelle Morris, 52, died on May 27 - three days after suffering a head injury in a disturbance in a house on Ramskir View, Stainforth, Doncaster. Two men, 47 and 33, and a 24-year-old woman arrested on suspicion of assault were re-arrested on suspicion of murder and bailed. Photo: Claire Lewis
12. Stephen Georgeson
Stephen Georgeson, 32, died after suffering a serious head injury in a suspected attack in the Houghton Road area of Thurnscoe, Barnsley. He was found injured on Friday, June 5 and died two days later. A number of arrests have been made. Photo: Claire Lewis