Camera Icon Police are seeking the identity of this girl, accused of assaulting a 21-year-old woman in Northbridge on Saturday night. Credit: WA Police

A 21-year-old woman was randomly attacked and had her handbag stolen in Northbridge on Saturday night by a group of young girls, police say.

About 11.30pm on February 2 the 21-year-old was waiting at a taxi rank on Melbourne Street when she was approached by a group of girls asking her for a cigarette.

When the victim refused, the group attacked her, hitting face several times before stealing her handbag, police said. She tried to retrieve her handbag but was allegedly assaulted again.

The group of girls ran away towards the Perth Train Station.

Perth detectives have released images of two women they think can help with their investigation.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or crimestopperswa.com.au