Transit Crime Investigation Unit detectives have arrested a man in relation to a sexual assault at Sunshine Railway Station in November.
It is alleged the female victim, aged 28 from Bentleigh, was travelling on the Sunbury line towards the city when an unknown male boarded the train at Sunshine Railway Station about 8.15pm on 19 November.
It is alleged that after about 5 minutes, when the train was between Southern Cross Railway Station and Flinders Street Railway Station, the man exposed himself.
A man presented himself to a police station today where he was interviewed and released pending further enquiries.
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