Police are looking for a Strathfield man who vanished from Scarborough on Sunday.
28-year-old Sakithivel Loganathan was last seen at Scarborough train station around 3pm.
Police said his family is concerned for his welfare.
He hasn't used his bank account since Sunday.
Police don't know why he was in the Illawarra because he has no known associates in the area.
He was last seen wearing a grey jacket, dark blue tracksuit pants and a dark blue t-shirt with white stripes.
Anyone with information on his whereabouts is urged to contact Crime Stoppers on 1800 333 000.
Image: NSW Police Force