Video footage shows a woman being kicked in the head during an a mass fight involved four women and three men.
Passersby are forced to intervene as the woman stays unresponsive on the floor and the brawl continues.
She appears to have been knocked out when a man joined in the fight and kicked her in the head.
In the video, two men passing by can be seen trying to separate the group and stop the fight.
The incident took place in Leicester city centre on February 4.