Police are hunting for a teenage girl wanted over a fight outside Chadstone shopping centre that left a 13-year-old girl unconscious on Friday night.

Victoria Police spokesman Luke Zammit said police were attempting to track down a young woman "who may be able to assist with their inquiries" following the fight between four girls at the Dandenong Road bus terminal.

Emergency services were called about 5pm to reports of an assault.

Footage from 7 News appears to show two girls violently kicking and punching another two girls who were sitting on the edge of a flower bed outside the shopping centre.