An unidentified person died following a crash in Lancefield just before 2.30pm on Sunday, February 11.
Police said it is believed a white four-wheel drive travelling north along Pyalong Road left the roadway and struck a tree just before 2.30pm.
A yet-to-be formally identified passenger died at the scene and a second passenger was airlifted to hospital with life-threatening injuries and the driver was taken to hospital with minor injuries.
Police said the exact circumstances surrounding the crash are yet to be determined and investigations remain ongoing.
Anyone with information can contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.