A U.S. Marine Corps pilot died and another was injured in an AH-1Z Viper helicopter crash during a training mission in California.

SAN DIEGO — A U.S. Marine Corps pilot was killed and another injured after an AH-1Z Viper helicopter crashed Thursday evening during a training mission near Imperial Gables, California, the Marine Corps confirmed.

The aircraft, assigned to Marine Light Attack Helicopter Squadron 369, part of the 3rd Marine Aircraft Wing based at MCAS Miramar, went down around 7:05 p.m. in an unpopulated area, officials said.

One of the two pilots was transported to Pioneers Memorial Hospital in Brawley and later confirmed dead. The second pilot was taken to Desert Regional Medical Center in Palm Springs, where they remain in stable condition.

Maj. Gen. James B. Wellons, commanding general of the 3rd Marine Aircraft Wing, expressed condolences to the fallen Marine’s family and squadron.

“It is with profound sadness that I share the loss of a Marine from 3rd Marine Aircraft Wing and the “Gunfighters” while conducting a training flight in support of the Marine Corps Weapons and Tactics Instructor Course,” Wellons said. “This Marine made the ultimate sacrifice, and we are forever grateful for his selfless commitment and willingness to go into harm’s way. To the family, friends, and loved ones of our fallen Marine, we send our deepest condolences and offer our unwavering support during this time of grief.” 

The crash occurred during a training flight supporting the Marine Corps Weapons and Tactics Instructor Course. The cause of the crash remains under investigation.

The Marine Corps said the name of the deceased pilot will not be released until 24 hours after next of kin have been notified.

The 3rd Marine Aircraft Wing, headquartered at MCAS Miramar, said it is providing support to the families and fellow service members affected by the tragedy.