A mother and her two young children have been killed after apparently jumping in front of a high-speed train in west London.
The 27-year-old woman and her five-year-old daughter died instantly when they were struck by the Heathrow Express service at Southall railway station at around lunchtime today.
Her nine-month-old baby son was taken to hospital, but later died from his injuries.
Several people are thought to have witnessed the incident.
British Transport Police have opened an investigation.
