A child has died and several others have been injured following a serious truck accident at Menangle this afternoon.
Emergency services were called to the southbound rest area of the Hume Highway at Menangle just after 3pm today, following reports a b-double had crashed into several parked cars.
It has now been a confirmed that a young girl died at the scene.
At least four other people were injured and treated at the scene by NSW Ambulance paramedics before being taken to Liverpool Hospital.
A woman is in critical condition while others are reported to be in serious but stable conditions.
The male driver of the truck was uninjured. He will be taken to hospital for mandatory drug and alcohol testing.
Camden Police officers attended the site and established a crime scene, which will be examined by specialist police from the Metropolitan Crash Investigation Unit.
NSW Police say no further information is available at this time.
Northbound and southbound lanes are open, while the rest area is closed.
However, one southbound lane will be intermittently closed as detectives investigate the crash, the Transport Management Centre stated.
Traffic is heavy travelling in both directions. Southbound traffic is queued from Narellan Road, while northbound traffic is queued from Picton Road.
Motorists are urged to avoid the area. For the latest traffic information visit www.livetraffic.com.
Several people are receiving medical attention after a serious accident on the Hume Highway at Menangle this afternoon.
Emergency service crews are on the scene at the southbound rest area as five people are being treated.
"Emergency services responded to reports several people have been injured after a truck crashed into parked vehicles in a rest area southbound on the Hume Highway at Menangle just after 3pm," a NSW Police spokeswoman said.
A NSW Ambulance spokesman said eight ambulance crews were attending the incident.
He said paramedics and specialist medical teams were currently treating five patients.
Their conditions are unknown at this stage.
As yet, none of the patients have been transported to hospital as they are all being assessed and treated at the scene.
LiveTraffic reports heavy traffic conditions on the highway due to a police operation at the Partridge VC Rest Area.
The rest area is closed until further notice.
Motorists are advised to allow for the extra time and exercise caution on the roads.