A gunman wearing an Afghan police uniform has killed three Nato staff in the south of the country, the coalition has said.

一名身着阿富汗警服的枪手在阿富汗南部地区杀死三名北约工作人员。

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Then a chorus of 30 men and women, each wearing a blue police uniform, 3)launches into a 4)spirited 5)rendition of We Are the World.

然后，由30名身穿蓝色警察制服的男女组成的合唱团慷慨激昂地唱起《我们同属一个世界》。

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The killing of General Mohammad Daud Daud, the police commander for northern Afghanistan, on Saturday by a suicide bomber who infiltrated security wearing a police uniform, highlights a recent change in Taliban tactics, says the BBC's Bilal Sarwary in Kabul.

BBC: Shift in Taliban tactics alarms Afghanistan government

Breivik, 33, carried out the meticulously planned attack on 22 July 2011, wearing a fake police uniform, and methodically hunted down his victims.

BBC: Anders Behring Breivik: Norway court finds him sane

About 200 insurgents, whom police say were wearing military uniform, ambushed a security checkpoint in Upper Dir, outside Pakistan's tribal areas.

BBC: Afghan militants ambush Pakistan troops in Upper Dir