The Avicii concert kept Toronto EMS scrambling Saturday night, with at least 29 people ending up in hospital to be treated for illnesses related to alcohol or drugs.

That number is unusually high, said duty officer George Eliadis. It’s not typical for that many people to require hospitalization at that kind of concert.

Rogers Centre had its own medics on site, but staff reportedly became overwhelmed by the number of patrons requiring medical assistance and EMS had to be called.

According to media reports, one person was arrested and at least one other was treated for drug use, but the vast majority became ill to varying degrees as a result of alcohol consumption. .

Paramedics said patrons were getting sick before Avicii made it on stage.

The sold-out electronic dance concert welcomed fans of all ages. Approximately 20,000 people piled into the Rogers Centre to see the Swedish DJ.