Police are appealing for witnesses following an incident in Mentone where an elderly man was struck by a car on 29 August.
Police believe the man was crossing a slip lane at the intersection of Nepean Highway as it turns into Lower Dandenong Road, when he was hit by a silver Toyota Corolla travelling east bound at 10.20am.
Investigators have been told that four men, who were not involved in the collision, rendered assistance to the injured pedestrian prior to paramedics arriving.
Police are urging these four men to contact police as they are crucial to the investigation.
The driver of the car, an 85-year-old Brighton East woman, has been interviewed in relation to the incident.
The injured man was conveyed to Sandringham hospital and is still receiving treatment.
Cheltenham Police are urging anyone who may have seen the incident or the men who rendered assistance at the scene to contact Crime Stoppers on 1800 333 000 or visit their website at www.crimestoppersvic.com.au