A woman in her 40s has been arrested on suspicion of murdering a 10-year-old boy.
She walked into a police station in the early hours of Sunday to speak to officers and a short while later the boy was found dead at a home in Cumberland Park, Acton, west London.
Police believe they know the identity of the boy, who was known to the woman, Scotland Yard said.
No-one else is being sought in connection with the death.
