From the AFP:

A 27-year-old army lieutenant, identified only by his family name Oh, was found shot and dead inside the South Korean military camp in the northern Iraqi city of Arbil on Saturday, the ministry said in a statement.

He sustained a shot under his jaw at an army barber shop, with his own rifle and an empty cartridge found nearby, it said. There were no signs of him being attacked, it added.

The situation appears to likely be a suicide or an accidental discharge, but we won’t really know until a full investigation is conducted.