The NATO-led force in Afghanistan says an attacker wearing an Afghan National Army uniform has killed one of its soldiers in the eastern part of the country.
According to the International Security Assistance Force (ISAF) statement, an investigation is under way but there were no details about the incident.
ISAF did not give the nationality of the slain service member, as ISAF usually waits for member states to provide details about troop deaths.
The attack is one of several this year in which Afghan soldiers or insurgents disguised in military uniforms have opened fire on NATO troops.
The incidents have sparked mistrust between the NATO-led coalition and its Afghan partners as NATO gears up to hand over security to local forces ahead of a 2014 deadline for the withdrawal of foreign combat troops.
Based on reporting by AP and AFP