Michigan International Speedway

BROOKLYN, Mich. (AP) — At least four people died while attending a weekend music festival in southern Michigan, including three men who likely succumbed to carbon monoxide exposure inside a travel trailer, authorities said Saturday.

Two more men were in critical condition at a hospital from the same exposure, the Lenawee County sheriff's office said. The five men were in their early 20s.

A concerned friend called 911 around 1:30 p.m. when he had not heard from them during the Faster Horses Festival at Michigan International Speedway, 80 miles (128.7 kilometers) west of Detroit. They were staying at a campground in Woodstock Township.

“This tragic incident is being investigated as a suspected carbon monoxide exposure from a generator located very near the travel trailer,” the sheriff's office said on Twitter.

Separately, state police reported the death of a 30-year-old woman, Melissa Havens of Croswell.

The cause and manner was unknown, state police said, although investigators were looking for a suspect.

“Detectives want the public to know there is no danger or threats to people attending” the music festival, state police said.

Copyright 2021 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.

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