An 18 year old man has been killed at a regional speedway northwest of Melbourne when a driver lost control and struck a spectator.

A spectator has been hit by a car and killed at a speedway in regional Victoria.

Police were told the car struck the person at the Stawell speedway on Burrong Basin Rd about 4.20pm on Saturday.

The spectator, an 18-year-old man from Pimpinio, died at the scene.

The driver of the car, a 28-year-old Wendouree man, was arrested and has been released pending further enquiries.

Police are keen to speak to witnesses or anyone with footage of the incident.

They say they are working to establish the exact circumstances of the incident and investigations remain ongoing.
Speed

—AAP