By Kalhan Rosenblatt - NBC News
Three men were killed while attending a country music festival in Brooklyn, Michigan, and two more were seriously injured in what is believed to be
a carbon monoxide leak,
authorities say.
Five people were found unconscious Saturday afternoon inside a travel trailer at a camp near the
Faster Horses Festival
, according to a statement from the Lenawee County Sheriff's Department.
Sheriff's department deputies found the five men and immediately began administering CPR treatment to the victims, the statement said.
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Three of the men died at the scene,
while two others remain in critical condition and are being treated for acute carbon monoxide poisoning, according to the sheriff's office.
Authorities responded to a 911 call from a friend of the men's group who
was concerned not hearing from them,
the statement said.
Officials are investigating the deaths and injuries
resulting from a suspected carbon monoxide leak from a generator located near the trailer.
The
Faster Horses Festival
describes itself as "Michigan's largest three-day country music and camping festival" and had started Friday in Brooklyn, about 40 miles west of Ann Arbor.
This year's performers or performers include Jason Aldean and Luke Combs.
Country music fans as Luke Combs performs on the main stage at the Faster Horses festival in Brooklyn, Michigan on July 16, 2021. Junfu Han / Detroit Free Press via USA TODAY Network
The festival did not immediately respond to a request for comment
from Noticias Telemundo's sister network
NBC News
about the deaths.
A 30-year-old woman also died at the festival, but her death is not related to suspected carbon monoxide poisoning.
The police are also investigating that death.
Officials urge those in the camps to remember to
keep exhaust fumes away from tent and vehicle areas.