A 25-year-old woman has been arrested following the death of a 20-month-old in Mansfield.
Nottinghamshire Police said officers were called just after 6.30am on Friday to a report of concerns for the welfare of a child at a house in Wharmby Avenue.
The child was taken to hospital for treatment but pronounced dead a short time later.
The force said the woman remained in police custody on Saturday and detectives and crime scene investigators were continuing their inquiries at the scene.
— Notts Police (@nottspolice) March 7, 2020
Detective Chief Inspector Rob Routledge, who is leading the investigation, said: "Any death of a child is a tragic incident and I understand the concern this will cause within the local community."
He added: "I would encourage anyone with any information to come forward as soon as possible as any information – no matter how small it may seem – could assist our officers."
Anyone with any information is asked to call Nottinghamshire Police on 101, quoting incident number 97 of March 6, 2020.