The soldiers’ names are being withheld until 24 hours after next-of-kin notification, and the incident is under investigation.

One soldier was killed and another was injured Wednesday evening in what was called a helicopter training incident at Fort Campbell, the Army post said.The soldiers' names were not immediately released and the incident is under investigation.

This soldier is mourned not just by Kentucky, but by a nation that owes its freedom to the selfless service of men and women like them," one lawmaker said.