UPDATE: 6:10pm, Freeway is still blocked west bound due to the earlier incident.
The west-bound lanes of the Western Freeway are blocked near Ballarat, after a serious crash and hazardous materials incident near a petrol station.
Traffic is backed up for more than half a kilometre at Warrenheip.
The alarm was raised at approximately 3:45pm
Firefighters are onsite clearing away debris left behind.
EARLIER TODAY: Police on scene of fatal accident in Kurunjang, Melton
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