MANCHESTER, Tenn. (AP/WKRN) — Officials say a person has died while attending the Bonnaroo Music and Arts Festival in Tennessee.

News outlets report Coffee County Sheriff Steve Graves confirmed a body was found Friday morning at a festival campground. Coffee County sheriff’s spokesman Lucky Knott says officials are investigating the cause of death but foul play is not suspected.

WKRN says 32-year-old Michael Craddock Jr. of Mt. Juliet was found dead inside a vehicle at the festival’s camping area around 10:30 a.m. Friday.

Graves said dozens of people have been treated for heat-related issues at the festival that began Thursday in Manchester and runs through Sunday.

Craddock’s death is the first on-site death at the music festival in three years.