Police are at the scene of a serious crash in Sydney's south west.
Officers attached to Campbelltown City Police Area Command were called to The Hume Highway, Blair Athol, following reports of a crash.
Emergency services attended and found two trucks had collided and one truck engulfed in flames.
Fire and Rescue NSW officers are working to extinguish the blaze.
Paramedics have treated a driver at the scene for various injuries.
All southbound lanes of the Hume Motorway are closed at Blair Athol, near Campbelltown. Diversions are in place and suitable for all vehicles. For more information visit www.livetraffic.com.
As inquiries continue, anyone who may have witnessed the incident or has dash cam or CCTV footage is urged to contact Crime Stoppers on 1800 333 000.
