The US Army says a military helicopter crash killed two troops at the Fort Campbell training grounds in Kentucky late Friday.
The 101st Airborne said the AH-64E Apache helicopter crashed at a training area just before 10 p.m. The cause for the crash is also now under investigation.
The crew was conducting routine training when the accident occurred and there were no other casualties, it said. Gen. Todd Royar said in a statement, according to multiple outlets.
The two soldiers were members of the 101st Airborne Division's 101st Combat Aviation Brigade.
"Our thoughts and prayers are with the families during this hard time".
The Army is not releasing the names of the deceased pending notification of the next of kin.
The incident followed another fatal military aviation crash this week.
On Wednesday, a U.S. Air Force fighter jet crashed at Nellis Air Force Base in Nevada during a training flight, killing the pilot.
"I think the high op tempo and stress on the force over the past 17 years of continuous combat operations in Iraq, Afghanistan, Syria, and elsewhere is catching up to the US military", he told the publication.
Also on Tuesday in Djibouti in East Africa a Marin Corps AV-8B Harrier crashed during takeoff.