A GOOD Samaritan who stepped in to defend a woman who was being bashed has critically injured her assailant.

The incident happened at Prahran train station, Greville St, shortly after 9pm Tuesday.

Detectives have been told a 23-year old man and a 29-year-old woman, both from Southbank, were involved in a physical altercation on a platform when a man attempted to intervene.



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When he was punched by the 23-year old, he retaliated, administering a beating that has seen the man placed in an induced coma with serious head injuries.

Police are calling on anyone who witnessed the incident to contact Crime Stoppers on 1800 333 000 or www.crimestoppers.com.au

Originally published as Woman attacker bashed by passerby