Police are investigating claims of sexual assault at a Halloween party at Mont Cascades. Three girls aged 16 to 17 are involved in the investigation. One 16-year-old was found naked and unconscious and hospital tests confirmed the presence of the date rape drug GHB in her system. The private party drew more than 1,000 people aged 16 to 21. There are reports that some were as young as 14. Emergency Services were called to the party for a variety of reasons including twelve young people with drug and/or alcohol poisoning who had to be taken to hospital. None of the cases were life-threatening.