There's been a death at Bonnaroo, the 4-day music festival in Manchester, Tennessee that draws more than 80,000 people annually. Doctors were called to the event's camping grounds on Thursday night. There, they pronounced a 32-year-old Pennsylvania woman dead, according to organizers.

The cause of death is unknown. It's not the first loss of life in the festival's ten years, though:

A 29-year-old North Carolina man died of heat stroke at last year's festival. Officials said David Sloane collapsed in front of medical personnel. He was rushed to the hospital, where he later died.

The Tullahoma News reported Sloane had a core body temperature of 108 degrees.

In 2009, an Alabama man also died while attending Bonnaroo. Officials said a clean-up crew found 26-year-old Matthew Lands' body inside his single-person tent.

A Kentucky man also died at the festival in 2007. Officials said the 25-year-old died on the first full day of the event.

Temperatures reportedly hit 91 degrees on Thursday.

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