A child has died and six people have been taken to hospital after three cars and a truck were involved in a crash on Sydney's M5 this morning.
NSW Police said emergency services were called to the M5 just east of the Belmore Road exit at Riverwood, after reports of a crash around 8:20am.
Police said one child died at the scene and another child, travelling in the same vehicle, was transported to St George Hospital in a serious condition with suspected head injuries.
Another 12-year-old girl was treated at the scene before being taken to Sydney Children's Hospital in a serious but stable condition.
NSW Ambulance said the driver of the car in which the child died was trapped for a lengthy period of time and had to be cut free.
She was also taken to St George Hospital in a serious condition.
Over a dozen firefighters and paramedics were on the scene.
The three other drivers were taken to hospital to be treated for non life-threatening injuries.
All lanes heading into the city were closed this morning, but two of them were reopened around 1:20pm.
Drivers were being advised to allow extra travel time and to divert through Belmore Road, Canterbury Road or Georges Road to re-join the M5.
Police have established a crime scene.
