Two U.S. soldiers were killed after their attack helicopter crashed on a training mission, the U.S. Army said Wednesday.

In a brief statement, the 1st Armored Division said that the two soldiers were killed Tuesday night in the accident when their AH-64D Apache Longbow helicopter crashed at the Grafenwoehr Training Area in southern Germany.

The Army said it was investigating the crash, but the cause was not yet known. The Apache is in wide use by the U.S. Army, including in Iraq and Afghanistan. It has a two-person crew.

The identity of the soldiers, who were assigned to the 1st Armored Division's 12th Combat Aviation Brigade, was withheld until their families could be notified, the Public Affairs Office said.

Last week, a U.S. Air Force F-16 fighter jet crashed while on a training flight in eastern Germany. The pilot ejected safely.

No cause was given for that crash, which happened near the eastern German village of Oberkeil, the Air Force said. U.S. Air Force officials are investigating.

CountryWatch: Germany