The death of a four-month-old baby is to be investigated by child abuse officers after he was found ill at home in south-west London.
Met Police officers were called at 07:55 BST on 10 April to an address on Tolworth Broadway.
London Ambulance took the boy to a south London hospital, were he was pronounced dead about an hour later.
Officers said they were treating the death as "unexplained". No arrests have been made.
A spokesperson for the Met said: "At this early stage, the death is being treated as unexplained pending a post-mortem examination.
"Officers from the sexual offences, exploitation and child abuse command have been informed and are carrying out inquiries into the circumstances of the death."