BROOKLYN, Mich. (WOOD) — A woman was found dead Saturday at the Faster Horses Festival in Lenawee County, police say. Later that day, three people died and two were in critical condition after a separate incident.

The first woman was found around 7:30 a.m., the Michigan State Police said in a tweet. It is not yet known what caused her death, authorities say.

Authorities have identified her as 30-year-old Melissa Donna Havens from Croswell.

MSP says there is no threat to festival attendees.

MSP is looking for a man seen with Havens before her body was found. He is described as a Black man in his 30s with short black hair and a short beard. He was last seen in a gray hoodie.

Anyone with information should call D/Sgt. Daniel Drewyor at 734.819.8192.

The second incident happened around 1:30 p.m., when authorities were called for five people who were unresponsive, the Lenawee County Sheriff’s Office said in a release.

Authorities found five men in their early 20s in a trailer, all unresponsive. Medical staff began administrating CPR, the sheriff’s office said.

Three of the men were pronounced dead on scene.

Two were brought to a hospital in critical condition for acute carbon monoxide poisoning.

Authorities believe the incident was caused by carbon monoxide exposure from a generator near the trailer.

The sheriff’s office stressed the importance of keeping generators and exhaust fumes from vehicles away from camping areas.

The three-day music festival started Friday at the Michigan International Speedway.