Police are keen to speak to a man in relation to a violent assault at Beresfield Train Station last year.
A 22-year-old man was punched on a railway overpass at around 8pm on Wednesday, December 28.
He's then fallen down the stairs - fracturing his leg and ankle - before his attacker fled the scene.
Detectives have released a CCTV image of a man who may know more - he was wearing no shirt, a black baseball cap and was wearing cream-coloured pants.
Police believe other people may have been attacked at the station that night - anyone with information is urged to contact Crime Stoppers on 1800 333 000.