Updated

The NATO command says an individual wearing an Afghan army uniform has turned his weapon against foreign troops, killing one in southern Afghanistan in another apparent attack by Afghans against their foreign allies.

A statement Tuesday said the incident was under investigation and released no further details. The killing took place Monday.

Killings by uniformed Afghans of foreign soldiers and civilians rose dramatically last year, eroding confidence between the sides at a crucial turning point in the conflict. Deadly insider attacks surged to 61 last year compared to 35 a year earlier. In some cases, militants have donned Afghan army or police uniforms to attack foreign troops.