ENID, Okla. – Two pilots were killed in a "mishap" involving two training jets at Vance Air Force Base Thursday morning.

According to a release from the base, two T-38 Talons were performing a routine training mission when the mishap occurred at approximately 9:10 a.m. There were two people onboard each aircraft.

The names of the airmen killed were not released, pending notification of next of kin.

Vance emergency response personnel were on scene to "treat casualties and assist in recovery efforts."

The incident comes a little over a year after another T-38 from Vance crashed about 50 miles west of the base. The pilot in that crash, on Aug. 18, 2018, was able to safely eject from the aircraft.

The T-38 Talon is a "twin-engine, high-altitude, supersonic jet trainer used in a variety of roles because of its design, economy of operations, ease of maintenance, high performance and exceptional safety record," according to an Air Force fact sheet. The jet is the primary used as a trainer jet for airmen and has trained more than 72,000 U. S. Air Force pilots.

According to manufacturer Northrop Gunman, nearly 1,200 Talons were produced from 1961 to 1972, and more than 500 are currently operational with the Air Force and NASA. A replacement wing for the T-38 was designed to help extend the service life until 2020.

This story is developing.