Riot squads were called to the Enmore Theatre in US on Monday night . Sydney rapper YG has alleged gang affiliations and a history of violent concerts . 24-year-old man was charged with indecently assaulting a 15-year-old girl . Police dispersed about 2500 fans after the concert had finished . Several arrests were made and police are continuing their investigations .
Riot squads were called to the Enmore Theatre in Sydney on Monday night . US rapper YG has alleged gang affiliations and a history of violent concerts . 24-year-old man was charged with indecently assaulting a 15-year-old girl . Police dispersed about 2500 fans after the concert had finished . Several arrests were made and police are continuing their investigations .