BEAVER, Ohio (WTVN) -- A Pike County soldier was among five American soldiers killed in a friendly-fire incident in Afghanistan on Monday.

The Department of Defense has not officially released the names of those killed, but friends and family in Pike County confirm that Justin Helton, 25, of Beaver was among them.

A senior U.S. defense official told Fox News early Tuesday that the troops were killed when they requested air support from a B-1 bomber after coming in contact with enemy forces. 

"Five American troops were killed yesterday during a security operation in southern Afghanistan. Investigators are looking into the likelihood that friendly fire was the cause. Our thoughts and prayers are with the families of these fallen," Pentagon spokesman Rear Adm. John Kirby said.

If confirmed, it would be one of the most serious cases involving coalition on coalition friendly fire during the nearly 14-year Afghan war.

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