POLICE are appealing for witnesses to a February incident on the Belgrave line, where several people were allegedly threatened by a man on the train.
It is believed that the man approached several commuters on a city-bound Belgrave line train in the early afternoon of 27 February.
Police were told the man yelled at the passengers and threatened to kill them, before he was arrested at Camberwell Railway Station.
Witnesses to and victims of the incident are asked to come forward, including people who may have changed carriages or trains to avoid the man.
He is described to be of Caucasian appearance, is about 30 years old, had long brown hair and an unshaven face.
Constable Matthew Flemming said police were hoping to speak to passengers who saw or heard the man between 1.47pm and 2.30pm.
Anyone with information is asked to call Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.
