According to the Boston Globe, nearly 40 people who attended tonight’s Avicii concert at Boston’s TD Garden have been hospitalized after consuming a “dangerous substance.”

Update: 36 people were transported to an area hospital, while over 50 others were treated at the scene.



Of the hospitalized, many are described to be minors. Police officials deemed the situation a “mass casualty event,” as more than seven ambulances were called to the scene. All of the patients’ symptoms are considered minor.

Last month, 29 attendees of Avicii’s concert in Toronto were hospitalized for drug or alcohol-related illnesses.

Via Twitter, here are a few photos from the scene:

At least 15 ambulances lined up in staging areas outside TD Garden. More than 50 concert-goers taken to hospital. pic.twitter.com/k40Y28ikx6 — Tim Caputo (@Tim_Caputo) June 26, 2014

Mass Casualty phase 2 at Avicii show at TD Garden. Have seen 5 ambulances leave here in past 5 minutes pic.twitter.com/57574vqAcE — Josh Brogadir (@joshbNECN) June 26, 2014