Crews responded to a mass casualty incident at Boston's TD Garden Wednesday night.
Police and EMS confirm that 36 patients were transported and 50 more were treated at the scene.
No one was seriously injured.
According to emergency officials, most of the patients were underage and using alcohol and illicit drugs.
The ages of people treated ranged from 16 to 25.
According to an EMS deputy superintendent, there was nothing to indicate the use of the drug Molly.
An Avicii show was taking place at the time.
A police officer on the scene said that there were many young kids and it was very hot inside the building.