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6 American soldiers killed in Afghanistan

An Afghan border police officer has killed six American service members in eastern Afghanistan, NATO says.

An Afghan border police officer has killed six American service members in eastern Afghanistan, NATO says.

A man opened fire during a training mission Monday in the Pachir Wagam district of Nangarhar province near the border with Pakistan, said Zemeri Bashary, a spokesman for the Afghan Interior Ministry.

The gunman was also killed during the incident, NATO said.

Zemeri Bashary, a spokesman for the Afghan Interior Ministry, said the gunman was indeed a border police officer, and not an insurgent  wearing a uniform.

The Taliban claimed responsibility for the attack, saying the gunman joined the border police to kill foreign soldiers.

"Today he found this opportunity and he killed six invaders," Taliban spokesman Zabiullah Mujahid said in an email statement to the media.

There have been a number of incidents in which Afghan police officers turned on their trainers in deadly shootouts.

In July, a rogue Afghan soldier fired a rocket-propelled grenade on NATO troops, killing three British soldiers and wounding four others.

Also, in November 2009, an Afghan policeman killed five British soldiers at a checkpoint in Helmand. A month earlier, an Afghan policeman on patrol with U.S. soldiers fired on the Americans, killing two.

With files from The Associated Press