Attacker in Afghan army uniform kills ISAF member

An attacker wearing an Afghan army uniform killed a member of the NATO-led International Security Assistance Force (ISAF) in the south of Afghanistan on Sunday, the force has said.

At least 57 members of ISAF have been killed in so-called 'insider attacks' this year, undermining trust between coalition and Afghan forces, as NATO prepares to withdraw most combat troops by the end of 2014.

"An individual in an Afghan National Army uniform turned his weapon against ISAF service members, killing one," an ISAF spokesman said, declining to give the victim's nationality.