LAS VEGAS — The U.S. Air Force says two A-10 attack planes crashed in an area northwest of Las Vegas, but their pilots ejected safely.

Officials with the Nellis Air Force Base in a statement say the planes crashed around 8 p.m. Wednesday in a military training area known as the Nevada Test and Training Range.

Officials say both pilots have been released from the base’s medical center, where they were taken to after the crash. They were not immediately identified.

Officials say the aircraft were on a routine training mission when they crashed. They say the cause of the crash is unknown.

The A-10 entered service in 1976. It is among Cold War-era icons like the venerable B-52 bomber. Its official nickname is Thunderbolt II.