A woman has died in hospital following a collision in Ringwood East last month.
Investigators believe the 90-year-old Croydon woman was a passenger in a vehicle that was travelling along Old Lilydale Road when it was struck by a vehicle about 8.10am on 21 March.
She was transported to hospital and died in hospital on Wednesday 27 March.
The female driver of the vehicle stopped and assisted police with their enquiries.
The investigation remains ongoing and anyone who witnessed the incident or has dash cam footage is urged to contact Crime Stoppers 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au