In yet another attack on Indians in Australia, a Sikh was punched in his head by a group of Australians who also removed his turban while he was sleeping at a bus stop in Melbourne.

Police said they are investigating the "unprovoked" bashing of the 22-year-old Indian youth who was punched in the head and had his turban removed as he slept at a bus stop.

However, the name and other details of the Indian man has not yet been known.

"The Yarraville man was asleep at a stop near Epping railway station in Cooper Street about 12.45 am on Sunday when a bus pulled into the depot and five males, believed to be between 17 and 19 approached him," The Age reported.

Two of the five youths allegedly bashed the Indian man, while their three companions are believed to have tried to stop the assault, the report said, adding that the 60-year-bus driver and a passenger also tried to stop the attack. The five youths managed to escape from the scene.

"The victim suffered injuries to his mouth but did not need medical attention," the daily reported. Police have appealed for any witness in connection with the incident.

This is the latest among a series of racially-motivated attacks on Indians and students from the community.