A Canadian musical festival featuring performances from Calvin Harris and Iggy Azalea ended in tragedy over the weekend (02-03Aug14), when two people died from drug overdoses and 13 others were hospitalised for substance abuse-related ailments.

Police have launched an investigation into the passing of a 22-year-old man and 20-year-old woman, who were pronounced dead after reportedly ingesting "party drugs" at The Veld music festival at Toronto's Downsview Park.

Toronto Police Deputy Chief Mark Saunders says, "Out of the 15, two have succumbed and died as a result of ingesting what we believe to be party drugs which were purchased at the Veld music festival. People are saying it could be Mdma (methylenedioxymethamphetamine), it could be ecstasy, it could be Ghb (gamma hydroxybutyrate)... People are dying because they are ingesting this drug. We want to find that drug, we want to find out exactly what it is.

"If anyone you know was at that festival and you have concerns for their behaviour or how they are acting right now, or if they are in any kind of distress, it is important that they go to the hospital immediately and seek medical attention."

The event also included sets by dance star Armin Van Buuren and rapper Waka Flocka Flame.