A man has died after being thrown from his vehicle when it rolled in Mornington overnight.
Police believe the vehicle, which was travelling south on Nepean Highway, struck two light poles before it rolled about 12.15am. The driver, thought to be in his 20s, died at the scene.
Police are investigating whether speed was a factor in the crash and have called for anyone who saw the incident or who may have dash cam footage to call Crime Stoppers on 1800 333 000 or submit a confidential report.
Nepean Highway was closed in both directions between Strachans and Bentons roads while police processed and cleared the scene.