The Commissionerate Police on Thursday busted a sex racket after conducting raids on three beauty parlours in the city.The police, after conducting raids, rescued 11 girls and arrested four men from the parlours near Bhubaneswar Hotel in the Station bazaar square here.After getting a tip-off, the laxmisagar police conducted surprise raids on the parlours. The police are investigating into the matter to get more clues about other sex rackets functioning in the city.