A man wearing an Afghan army uniform shot dead a US service member in the east of the country, one of two NATO troops killed on Friday, military officials said. The Taliban took credit for the attack.
It was the 15th incident this year in which Afghan soldiers or insurgents disguised in military uniforms have turned their weapons on foreign troops.
The shootings have increased the level of mistrust between the US-led coalition and its Afghan partners and raised questions about the readiness of local forces to take over from NATO ahead of a 2014 deadline for the withdrawal of foreign combat troops.
An Afghan defense official said the incident took place in Kunar Province in northeast Afghanistan. The official spoke on condition of anonymity because he was not authorized to brief the media.
NATO did not disclose the nationality of the trooper killed, but a Pentagon spokesman, Navy Captain John Kirby, said the service member was from the US.
Kirby said US and allied officials are troubled that these attacks are continuing with some regularity despite efforts to improve the vetting of Afghans who are recruited into the army and police.
“It continues to be a very worrisome issue for us and for our Afghan partners,” Kirby said.
The coalition said an investigation into Friday’s attack was under way.
In a statement, Taliban spokesman Zabiullah Mujahid claimed the insurgent group was behind the shooting. The Taliban regularly take credit for attacks in the country, even if they are not involved.
The threat of Afghan soldiers or militants disguised in uniforms turning their guns on NATO troops has existed for years but has grown more deadly over the past five years. While there were only a few deaths reported in 2007 and 2008, 35 foreign troops were killed in such attacks last year.
So far this year, there have been 15 such attacks, killing 20 NATO service members, Lieutenant Colonel Jimmie Cummings, a spokesman for the US-led NATO coalition, said on Friday.
The coalition routinely reports each time a US or other foreign soldier is killed by an Afghan in uniform, but the military is underreporting the number of overall attacks.
The Associated Press reported last month that the coalition does not report attacks in which an Afghan wounds — or misses — his US or allied target. It also does not report the wounding of troops who were attacked alongside those who were killed.
US officials say that in most cases the rogue soldiers are motivated not by sympathy for the Taliban or on orders from the insurgents, but rather act as a result of personal grievances against the coalition.
NATO said a second service member died following an insurgent attack in southern Afghanistan, but did not provide further details about the death.