Perth detectives are hunting up to 20 youths, believed to be of African descent, who were involved in the attack in the city at 11.30pm last night.
Two males - aged 16 and 17 - have already been charged, but police have not ruled out further charges being laid.
This afternoon, 19-year-old James Claxon told how a night out with mates turned into a nightmare when he was allegedly set upon by the gang, attacked and robbed of his wallet and mobile phone.
Mr Claxon said he and four friends had just got off a train and had been walking through Forrest Place towards a city nightclub when they were confronted by the group.
``They were walking through in the same proximity and they've basically started running at us and they caught me and have beaten me up and stolen my things,'' he said.
``The only thing I heard before they caught me was: `Who are these white c**ts?' It was totally unprovoked.
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