Police are seeking help to find a 78-year-old man who was last seen at Westall railway station.
Minh Co Duong was spotted getting on a city-bound train at the station about 9.30am on 11 September.
Mr Duong has several medical conditions and may have fallen asleep on the train, police say.
There’s a possibility that he may also have got off the train at Clayton railway station.
Mr Duong is described as about 160 centimetres and wearing a black jacket and hat.
He has a walking frame, is blind on one eye and speaks limited English.
Any information to Moorabbin police station on 9556 6565.