A man has been assaulted after asking a fellow passenger to turn his music down on the train.
Police say a man boarded the train at Bentleigh on August 30 with a Bluetooth speaker playing very loud music – when a fellow passenger asked him to turn it down.
The man with the loudspeaker verbally abused him before punching him in the back of the head.
The offender got off the train at Glenhuntly and the victim continued into the city.
He is described to be Caucasian in appearance, aged in his late 20s to early 30s and was wearing a dark cap on backwards and a a red checked long sleeve shirt.
Police urge anyone who witnessed the assault or who has information to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au.