Seventeen people attending an electronic music festival at Ontario Place on Saturday night were taken to hospital for treatment of drug- and alcohol-related illnesses.
One of the guests at the Digital Dreams Music Festival was in critical condition after a possible overdose, Toronto EMS said.
All 17 were between the ages of 18 and 25.
It’s estimated about 29,000 people were at the concert at the time.
The festival continues on Sunday.