Major Collision Investigation Unit detectives have arrested a Burwood man following a fatal crash in Cowes on Monday morning (8 April).
Investigators have been told a car lost control at the intersection of Phillip Island Road and Ventnor Road about 5.50am and struck a tree.
The male passenger in the vehicle died at the scene.
The 34-year-old Burwood man was arrested about 6.20am this morning and has been taken to hospital for assessment where he remains under police guard.
He is expected to be interviewed after his assessment at hospital.
Anyone with information or who witnessed the incident is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au