The latest accident marks the fourth crash of a U.S. Air Force fighter jet since May.
The pilot was the fighter jet's lone occupant, and no other injuries were reported, according to the release.
The command chief of the 20th Fighter Wing at Shaw Air Force Base, South Carolina, was removed from his position last month.
Base officials were "exploring every possibility to get the answers we need to prevent this from happening again."
Air Education and Training Command (AETC) officials are monitoring developments at Shaw.
The airmen died at local hospitals, where they were taken after they completed their fitness tests on separate days
Senior Airman Aaron Hall, 30, died Saturday morning from health complications at Prisma Health Richland Hospital in Columbia.
The 20th Fighter Wing commander said Capt. Zoe Kotnik had "made mistakes."
Trying to leverage "Captain Marvel" movie, the Air Force names its first female commander of a single-aircraft demo team.
Roughly 400 airmen are selected for 365-day extended deployments on an annual basis.
The campaign of President Donald Trump released a letter from 235 retired senior officers backing his re-election.
The news comes four years after the Air Force laid out initial plans for what its future fighter jets might look like.
The recent exercises were one of many the Air Force is conducting to test its Advanced Battle Management System.
A veteran of the Marine Corps and Army National Guard, he went through boot camp more than four decades ago.
Cmdr. Robert Arias is at least the third Navy commander removed from his job in recent weeks.