The clip, believed to have been filmed outside a NAB branch in Melbourne, appears to show two teenage girls in a verbal argument over a boy.

“I’ll stop talking to him then, I will block him on Facebook,” a girl in a white coat says.

“Why would you hit me, what have I ever done to you?” she added.

“Because you are f****** with my mate and you’re razzing your boyfriend,” the other said.

The fight quickly escalated when the girl in the white coat started to walk away.

Down and out ... The victim of the king hit is kicked on the ground. Picture: Facebook Source: Facebook

Attack ... The girl in the white coat is punched as she tries to walk away. Picture: Facebook Source: Facebook

She was chased down by the other girl and king hit from behind, landing heavily on the ground, before being kicked a number of times.

Seconds later a passer-by stepped in and pulled the attacker off.

“Hey, hey hey, get the f*** off her,” he can be heard saying.

“Get off her you f****** idiot.”

It’s not known exactly when the footage was shot, but it’s already gone viral with close to 200,000 views since being uploaded this morning.

Intervention ... A man breaks up the fight giving the attacker a piece of his mind. Picture: Facebook Source: Facebook