FORT WAINWRIGHT, Alaska — U.S. Army officials say 21 soldiers are being evaluated after being exposed to carbon monoxide during a field training exercise Thursday near Fairbanks.
The Army says in a release that the paratroopers were at the Yukon Training Area near Eielson Air Force Base when they began to show symptoms of exposure.
It wasn't immediately clear how the soldiers were exposed or what the exercise was. An Army official didn't immediately return a call to The Associated Press.
The soldiers were taken to Bassett Army Community Hospital. Four were admitted; one was sent to Fairbanks Memorial Hospital, and seven have been released. The remaining soldiers are being evaluated.
The Army says it's investigating the incident.
The soldiers were from the 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division.