U.S. Army armored military vehicles form First Battalion, 502nd Infantry...

U.S. Army armored military vehicles form First Battalion, 502nd Infantry Regiment, 101st Airborne Division stand ready for night patrol in Afghanistan's Kandahar province. (Nov. 29, 2010) Credit: AP

 A U.S. official says six service members slain by an Afghan police officer were all Americans.

The U.S. official spoke on condition of anonymity because next of kin had not been notified.

NATO and Afghan officials say the border policeman turned his weapon on six of his NATO counterparts Monday during a training mission.

It was the latest in a string of such killings this year as U.S.-led troops intensify a push to expand Afghan forces. The Taliban claimed responsibility for the attack.

Get the latest news and more great videos at NewsdayTV Credit: Newsday

Disturbing details in Jor'Dynn Duncan death ... What's the weather forecast? ... Out East: LI Game Farm ... Get the latest news and more great videos at NewsdayTV

Get the latest news and more great videos at NewsdayTV Credit: Newsday

Disturbing details in Jor'Dynn Duncan death ... What's the weather forecast? ... Out East: LI Game Farm ... Get the latest news and more great videos at NewsdayTV

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