A WOMAN and child are dead, while a second woman and child are in a critical condition following a crash on the Hume Highway at Wilton, south of Sydney.
A 49-year-old woman driving a Mazda 4WD died at the scene. A seven-year-old boy and a seven year-old girl also in the Mazda were trapped for a short time.
The seven-year-old boy died on arrival at Liverpool Hospital while the seven-year-old girl is in a critical condition at the Children's Hospital, Westmead.
A 49-year-old woman, driving a Holden Astra, was trapped for some time before she was released. She was taken by NSW Ambulance paramedics to Liverpool Hospital where she remains in a critical condition.
The next of kin of all parties have been notified.
The Hume Highway southbound is closed. Crash Investigation officers are on scene.
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