A council is to undertake a serious case review into the death of a 10-week-old baby in Doncaster whose family was known to social services.
An 18-year-old man has been arrested and bailed following the death of Ashley Shaw on Monday.
A post-mortem examination has not established the cause of death. Police said the teenager was arrested on suspicion of harming a baby.
Similar reviews are under way into the deaths of seven other local children.
Police said the baby, from the Highfields area, was initially taken to the town's Royal Infirmary and later transferred to Sheffield Children's Hospital where he died.