KABUL, May 6(AP/UNB) - NATO says an attacker wearing an Afghan army uniform has opened fired on coalition service members, killing one.

The NATO statement says coalition forces returned fire and killed the shooter Sunday in southern Afghanistan.

The alliance says an investigation is under way. It provided no other details.

The shooting is the latest in a string of attacks against U.S. and other foreign forces by their Afghan partners or assailants posing as them.