A man was found dead at Tennessee's Bonnaroo Music and Arts Festival Friday morning. According to a statement released to press, the 35-year-old festival attendee was unresponsive in his car. Later on, The Coffee County Medical Examiner pronounced him dead. The man's cause of death has not yet been confirmed. The car was running and the heat was on, according to the statement. The man's identity has not been revealed.

"The safety of our patrons is our highest priority, and our sympathies go out to his family and friends," reads a message from Bonnaroo released to Billboard.

Friday's incident is the 13th recorded fatality in Bonnaroo's history. The 2018 iteration of the annual fest, which began Thursday, will continue until Sunday with performances from Eminem, Future, Playboi Carti, and more. View the full lineup here.

The full statement regarding the man's death can be found below.

At 10:05 a.m. this morning, patrons approached the medical team in Plaza 6 requesting medical assistance for a 35-year-old male patron in his car. The medical team responded immediately and found him unresponsive upon arrival. The Coffee County Medical Examiner’s office later pronounced him dead.

Our understanding is that his car was running and the heat was on, but cause of death has not been determined. The safety of our patrons is our highest priority, and our sympathies go out to his family and friends. We have no further information at this time. Additional inquiries should be directed to the Coffee County Sheriff’s office.