Air Force officials have identified an airman who died at Kunsan Air Base in South Korea as Tech. Sgt. Joshua Arndt.

Arndt, 35, was found unresponsive in his dorm room around 8:50 a.m. on Monday and pronounced dead by emergency responders roughly 20 minutes later, according to the 8th Fighter Wing.

No further information about the cause of his death was immediately available.

 “We are deeply saddened by the loss of Tech. Sgt. Arndt,” Col. Christopher Hammond, commander of the 8th Fighter Wing, said in a news release. “On behalf of the Wolf Pack, I offer our sincerest condolences to his family, friends and fellow airmen.”

Arndt served as a section chief in aircraft fuels system with the 8th Maintenance Squadron, the news release says.

His death is under investigation.

“During his tour, Joshua immediately made an impression on those around him as he diligently led his section and worked to improve the unit, while making those around him better,” Arndt’s squadron commander Maj. Bryan Kloepper said in the news release. 

“The love, care and friendship he offered those around him are irreplaceable, and we’ll never forget his friendly, welcoming smile. He made a lasting impact on us all and will truly be missed.”