One dead, two injured in three car Victorian smash

A man has been killed and another has suffered serious injuries after an horrific three-car crash in Melbourne's outer-west today.

A Victorian Police spokeswoman said the driver of one of the vehicles was killed during the collision which occurred about 6am on Derrimut Road, Tarneit.

Another man was flown to The Alfred Hospital with serious but non-life threatening injuries.

Paramedics also treated a third man at the scene for minor injuries.

Police are still diverting traffic around the site and VicRoads has advised motorists to allow for extra travel time.

Investigators from the Major Collision Investigation Group are now on scene and have called for anyone who may have witnessed the crash to come forward or contact Crime Stoppers on 1800 333 000.