FORT RILEY, Kan. (AP) -- The Army is investigating the death of a Fort Riley soldier from upstate New York.

Officials at the northeastern Kansas post say 21-year-old Pvt. Thomas Lavrey was pronounced dead after being found unresponsive in his living quarters on Sunday. The cause of death remained under investigation Wednesday.

Lavrey was a native of West Seneca, N.Y., a suburb of Buffalo. He joined the Army in March 2010 and was assigned to Fort Riley in September of that year.

He was a utilities equipment repairman assigned to Headquarters and Headquarters Company, Special Troops Battalion, 1st Sustainment Brigade, 1st Infantry Division.