Three men in Afghan police uniforms have killed a soldier with the NATO coalition, in the latest so-called "green-on-blue" attack.
The three attackers fled after the killing on Monday, NATO's International Security Assistance Force (ISAF) said in a statement, and are being sought.
The death takes the toll this year in "green-on-blue" attacks - in which Afghan forces turn their weapons against their Western allies - to 23, in a total of 17 such incidents.
"The International Security Assistance Force confirms that three individuals in Afghan police uniforms turned their weapons against coalition service members in southern Afghanistan yesterday, killing one ISAF service member," ISAF said.
A police source in southern Kandahar province said two NATO soldiers were killed when the police opened fire on them.
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