Two people have been arrested on suspicion of manslaughter after a 12-day-old baby was fatally attacked by a dog.
A 35-year-old man and 27-year-old woman have been arrested on suspicion of gross negligence manslaughter.
The pair have been bailed pending further enquiries and the dog has been removed from the address.
"Police were called to an address on Welfare Road in Woodlands, Doncaster at around 3.30pm on Sunday following reports that a dog had attacked a child," a police spokesman said.
"On arrival at the property, emergency services discovered a 12-day-old baby boy had been bitten by a dog and suffered serious injuries.
"The child was taken to hospital, but sadly died a short time later."