United States and German authorities are investigating the death of an American soldier whose body was found near a train station in Bavaria, the U.S. Army said Tuesday. 

1st Sgt. Nicholas S. Amsberry, 34, was serving in a nine-month deployment to Europe as part of Atlantic Resolve, a mission that supports U.S. allies in Eastern Europe in the wake of Russia's annexation of Ukraine's Crimean peninsula. 

The cause of death is under investigation. His body was found in Parsberg, Germany, which is close to a military training center. He died on Feb. 4.

Amsberry, from Mesa, Ariz., entered the Army in 2003 as an infantryman. He deployed to Europe in September 2017. 

"Our deepest sympathies go out to the family of 1st Sgt. Nicholas Amsberry," said Lt. Col. Peter Moon, his commander, in a statement. "We know the death of a family member is an immeasurable loss. It's a loss shared by soldiers across our formations."

Atlantic Resolve's aim is to demonstrate U.S. commitment to the security of NATO allies and partners, conducting bi-lateral training and multinational exercises in Estonia, Latvia, Lithuania, Germany, Poland, Slovakia, Hungary, Romania and Bulgaria.