The Rubio family of Dixon, California, is mourning the loss of 21-year-old Private First Class Tanner Rubio . The Marine was killed in a vehicle mishap during training at Camp Pendleton, according to the United States Marine Corps.

"It's tragic that things happen, accidents. We don't know what happened," said Mark Rubio, the Marine's father.

The Marine Corps said in a statement that the incident is under investigation. The family on Wednesday received the news no parent ever wants to hear.

"The Marines sat us down and told us there had been an accident," Mark said. "It's just tragic to hear those words and the emotions rip through you. You can't stop it."

Tanner's family says he joined the Marines in January alongside his best friend. He wanted to serve his country and make his fam

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