Police want to speak to anyone who saw two teenage girls fighting on Bath Street last Friday night.
One of the girls, who had dark hair, suffered a bloodied nose.
It happened outside Chords coffee shop between 9 and 9:30pm.
After the fight they were confronted by members of the public by the Quicksilver shop, before running off towards West's Centre.
One of the girls was wearing a long white jacket with black leggings, the other wearing a grey dress and black overcoat.
They were both arrested - one for grave and criminal assault and one for breach of the peace.
They've been released on bail.