Eleven individuals, including six U.S. service members, were killed Friday in a C-130 transport plane crash at Jalabad airport in Afghanistan.
The six service members were aircraft crew, NBC News reported. The other five were civilian contractors on board as passengers, CNN reported.
The five civilian contractors were party of the NATO-sponsored "Resolute Support" mission to train Afghan security forces, NBC News reported.
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The crash cause hasn't yet been determined. MIlitary officials said they hadn't detected any hostile activity in the area.
"With high confidence, it does not appear at this time that enemy fire was involved in the aircraft crash," said Maj. Tony Wickman, a spokesman for the U.S. military, in an email to CNN. "We have first responders on scene working at the crash site doing recovery operations."
The names of the dead aren't yet released. The military's policy is to keep private the names of killed for at least 24 hours, in order to allow time to notify family members, the Air Force Times reported.
The news outlet reported Taliban members have claimed they shot the plane from the sky, but military officials insist that's not true.