Avicii's True Tour reached Boston last night (Twitter/@AxwellBR).

Paramedics at the concert, held at the TD Garden, report concertgoers suffered from dehydration, alcohol and drug use. No critical injuries were reported.

The Boston Globe reports a majority of the patients were between the ages of 16 and 25.

Rolling Stone reports the incident was declared a "Level 2 Mass Casualty." This level is meant to "notify area hospitals of the potential for 11-30 incoming patients and allow for them to be prepared for that influx."

Later that evening, Avicii tweeted his response to the situation: "Just hearing the awful news abt tonight. [It's] a terrible thing, I rly hope everyone is ok! My thoughts go to those affected & their families."

Read more on the incident here and here.

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