Një ushtar amerikan akuzohet për vrasjen e 16 civilëve afganë
U.S.-forces have stepped up security in Afghanistan after a U.S. Army sergeant went on an apparent shooting spree, killing 16 Afghan villagers -- many of them children.

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Anar Gul gestures to the body of her grandchild, who was allegedly killed by a U.S. service member in Panjwai, Kandahar province south of Kabul, Afghanistan, March. 11, 2012. (AP)

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An armored military vehicle from the NATO-led International Security Assistance Force (ISAF) is seen at right, as the covered body of a person who was allegedly killed by a U.S. service member is seen inside a minibus in Panjwai. (AP)

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Afghan men investigate at the site of an shooting incident in Panjwai. (Reuters)

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A man points to bloodstains, where witnesses say Afghans were killed by a U.S. service member, in Panjwai. (AP)