Police are investigating the deaths of a five-year-old boy and a four-year-old girl who are believed to have been stabbed in south London, Scotland Yard said on Saturday.
A third child, a six-month-old baby, is suffering from suspected stab wounds and in a critical condition in hospital.
All three children were found at a home in Carshalton on Friday evening after police and the London Ambulance Service were called, but the five-year-old and the four-year-old died later in hospital.
A 39-year-old man and a 35-year-old woman have been arrested and officers from the Homicide and Serious Crime Command and the Child Abuse Investigation Command have launched an investigation.
