Pfc. Edwin Thomas is seen in this undated photo provided by the U.S. 2nd Infantry Division on Dec. 21. Yonhap

An American helicopter repair soldier stationed in Korea died earlier this week in a "flight-related" accident at a major U.S. military base, a U.S. Army unit said Saturday.

Pfc. Edwin Thomas, 20, was pronounced dead Thursday at a military hospital inside Camp Humphreys in Pyeongtaek, about 65 kilometers south of Seoul, after an accident took place there earlier in the day, according to the U.S. 2nd Infantry Division.

The unit did not offer details of the accident, noting that it remains under investigation.

"Edwin was a valued member of the Nightmare Battalion family. ... We will honor our time with him as he left an indelible mark on our battalion and his company," Lt. Col. Anthony Snipes, commander of Thomas' battalion, said in a release.

Thomas, a CH-47 Chinook helicopter repairer, joined the U.S. Army in August 2023 and had been assigned to a company under the 2nd Combat Aviation Brigade since April 2024. (Yonhap)