(credit: CBS)

(credit: CBS)

CEDAREDGE, Colo. (CBS4) – A teen has died and another is in critical condition after being exposed to carbon monoxide in a camper.

Three boys slept in the camper Sunday night in Cedaredge on the Western Slope. The boy who died has been identified as Reid Gates of Cedaredge.

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Gates, along with Aaron Henrie and Tyler Cooper were airlifted to the Rocky Mountain Hospital for Children in Denver. Henrie remains in critical condition and Cooper is listed in good condition.

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The boys attend Cedaredge High School. Their exact ages haven’t been released.

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Doctors say the three somehow were exposed to the odorless, colorless gas overnight.