A train passenger has captured a vicious assault where another passenger was shoved, slapped and punched in the face in Melbourne.

The vision from the June 29 incident was released by police on Wednesday, showing a man on a Ringwood-bound train abusing the victim before violently shoving his face into a train window.

View photos A man is wanted over a violent assault on a Melbourne train where a passenger was slapped and then punched in the face. Picture: Police Victoria More

The assault at 9.45pm was sparked after it is believed the victim made a comment to the man, who had spent his few minutes aboard from Camberwell Railway Station swearing and making comments to other commuters.

The offender can be seen taunting the man, while his female colleague pushes him away.

Other passengers appear concerned about the confrontation, some intervene, while others change seats to move away from the abusive man.

The offender then returned to his seat and disembarked at the next station, police say.

But the man immediately reboarded, ran at the victim and punched him in the face.

View photos The offender violently shoved the victim's face into a train window, causing mild concussion. Picture: Police Victoria More

In a video recorded by another passenger, the offender can be heard telling the man: "Don't look at me like you want to fight me," to which he replied: "no I don't".

The man can be heard continuing to taunt the victim.

"I'll f***ing wreck ya, I'll f***ing gut you like a fish in front of all these f***ing people," the offender threatens him.

"I'll f*** you like a whore."

The victim can be heard telling him to stop, as other passengers appear visibly upset by the confrontation.

Some of the passengers intervened and pulled the man off the victim before he broke free and ran off the train.

View photos Police are hoping to track down this man to help with their investigations into the alleged assault. Picture: Police Victoria More

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