Hunt for man wearing a baseball cap as he follows a young woman up escalators at Melbourne station

Footage has been released of a man who police believe may be able to assist them with enquiries into the alleged repeated sexual assault of a woman on a Melbourne train. 

Police have been told the woman boarded a city-bound train at Thornbury station on May 16, just after 9.30am and was repeatedly assaulted by a man.

The 49-year-old woman moved away from a man a number of times but he allegedly continued to follow her through the carriage and out of the station.

The 49-year-old woman moved away from the man a number of times but he allegedly continued to follow her through the carriage and out of the station in Melbourne

The woman, who was on the train for about 30 minutes, before she got off the train and reported the alleged incident to station staff

‘She got off the train at Flagstaff Station and he continued to follow her and engage in conversation,’ Victoria Police said in a statement. 

The woman, who was on the train for about 30 minutes, took the escalators only for the man to follow her on May 16.

CCTV footage shows a man, believed to be about 20 to 25 years old, taking an escalator beside the 49-year-old woman before he hovered at the top and allegedly attempted to engage in conversation and follow her.

When the woman altered train station staff the man left.

Police said the man was described to be of Islander or Asian appearance and about 160 centimetres tall with a slim build and thin moustache.

The man was wearing a New York Yankees baseball cap and baseball style jacket at the time.

Anyone with information is urged to call Crime Stoppers.

Police said the man was described to be of Islander or Asian appearance and about 160 centimetres tall with a slim build and thin moustache