NATO says an attacker wearing an Afghan army uniform has opened fire on a group of coalition service members, killing one person.

The alliance says the shooting took place on Friday in eastern Afghanistan.

A NATO statement did not identify the nationality of the service member killed. Also, there was no immediate word on the status of the gunman.

The Associated Press says the Taliban claimed responsibility for the attack.

The incident is among several recent attacks in which Afghan soldiers or insurgents disguised as soldiers have fired on NATO troops.

Earlier this month, NATO said coalition forces shot and killed a man dressed in an Afghan army uniform after the man fired on a group of coalition soldiers, leaving one dead.

In April, an Afghan soldier shot and killed an American service member in southern Kandahar province.

The incidents have raised concerns about security in Afghanistan at a time when international combat troops are preparing to withdraw from the country.

International forces are set to transfer full security responsibility to Afghan forces by a 2014 deadline.