An airman assigned to Altus Air Force Base, Oklahoma, was found dead in his home on base Monday morning.

The individual was identified as Staff Sgt. Robert A. Alvarez, according to an Altus press release Wednesday. The death is being investigated by the Air Force Office of Special Investigations.

Alvarez was reported as deceased at approximately 8:18 a.m.

An Altus public affairs airmen told Air Force Times that OSI investigates all deaths on base.

He was assigned to the 58th Airlift Squadron at the time of his death.

Alvarez’ brother, Master Sgt. Andres Alvarez, who in April was a fuels operation section chief assigned to the 97th Logistics Readiness Squadron at Altus, talked his younger brother into joining the Air Force, according to a press release from the base.

“I didn’t join until I was about 23," Robert Alvarez said. "He told me to get my act together and the Air Force had the opportunities I was looking for. He was a big inspiration for me joining the Air Force.”

Col. Eric Carney, 97th Air Mobility Wing commander. said Alvarez will be missed.

“It burdens me to lose any member of the 97th family. Every member is an essential part of our 97 AMW team. Please join me in conveying our deepest condolences to his family, friends, the 58th Airlift Squadron and all who were close to him,” Carney said.