Dozens of people were taken to hospitals after a house music concert at Boston's TD Garden late on Wednesday night, potentially due to drugs and alcohol.
Ambulances transported 36 people to hospitals from the Swedish DJ Avicii's concert at the city's downtown arena, said a spokeswoman for Boston's Public Health Commission.
No information about the cause of illness or injuries could be provided, given patient confidentiality, said the spokeswoman. But local news outlets on the scene said concertgoers receiving treatment were mostly suffering from drug and alcohol intoxication after the "rave" -
"I asked an EMS worker what kind of patients theyre transporting to the hospital, dehydrated, drugs, alcohol?:'A combination of everything,'" tweeted a reporter for Boston's WHDH-TV. "One worker said 'vomit everywhere.'"
The concert was the opener of Avicii's four-month tour through the United States and Europe, with a second show planned at Mohegan Sun in Connecticut on Friday night.
Avicii, whose real name is Tim Bergling, called the incident "awful" in a Twitter post Thursday morning.
"Its a terrible thing, I rly hope everyone is ok! My thoughts go to those affected & their families," he wrote.
Overindulgence is often seen at such raves - concerts or parties presided over by a DJ playing electro-dance music. Last September, New York City's Electric Zoo music festival, at which Avicii was a headliner, was cut short after two concertgoers died, apparently from overdosing on MDMA, a popular rave drug known as ecstasy or Molly.
Last month, more than two dozen people were hospitalized for drug and alcohol-linked problems at an Avicii concert in Toronto.
Boston police have launched a license and permits investigation related to the incident, said a spokeswoman for the department.
TD Garden could not immediately be reached for comment. (Editing by Richard Valdmanis and Bill Trott)