Police want to speak to anyone who filmed a fight involving two 19-year-old girls in Liberation Square at the weekend.
They were having an argument between 2:05 and 2:10 on Sunday morning when one of the girls, wearing a blue denim jacket over a green crop top, attacked the other.
It caused injuries to the girl's hands, arms and head - but she didn't go to hospital.
Officers think several people recorded the attack and want anyone with footage to come forward.
Anyone else who may have seen this or who has any information is asked to contact police on 612612 or the independent charity Crimestoppers anonymously on 0800 555 111 or via their Anonymous Online Form at Crimestoppers-uk.org.

Channel Islands music school to hit global stage with Dubai launch
Price of food in Jersey increased by 3.7% in a year
Political candidates asked to commit to 20 pledges for island sport
The Channel Islands are officially in meteorological drought
Tourism rule changes remove red tape for hotels and other accommodation
Heroin importer jailed
Extra Portsmouth sailings to clear backlog of stranded passengers
Islanders asked for views on body image and masculinity
Comments
Add a comment