A baby girl was pronounced dead on arrival at a hospital in Cambridgeshire.
Police responded to concerns for the wellbeing of a woman and her baby in her home in Oxford Way, Cambourne, at7.40am on Saturday.
The baby was rushed to Addenbrooke’s Hospital in Cambridge, where she was pronounced dead on arrival.
Cambridgeshire Police confirmed the woman was also taken to the same hospital and has been kept there.
A force spokesperson said: ‘Police are treating the death as suspicious and the woman in hospital has been arrested in connection.’
Detective Inspector Andy Moralee said: “This is a tragic death of a baby girl – a very sad and, we believe, isolated incident.
‘The circumstances remain under investigation, but we are treating her death as suspicious.’