One woman has died, another is an induced coma and almost 70 people have been charged with possessing and supplying drugs at Sydney's Stereosonic music festival.
Police say a 25-year-old woman was taken ill during the festival at Sydney Olympic Park on Saturday but later died in hospital.
A 22-year-old was also taken to hospital in a critical condition and placed in an induced coma.
Meanwhile, 69 people were charged with with possessing and supplying drugs, a number police said was "alarming and disappointing".