Një ushtar amerikan akuzohet për vrasjen e 16 civilëve afganë

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)

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)

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

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

Afghan National Army soldiers keep watch inside a U.S. base in Panjwai. (AP)

A U.S. Army soldier directs traffic as Afghan citizens gather in Panjwai. (AP)

Afghan National Army soldiers keep watch as Afghans gather outside a U.S. base in Panjwai district. (Reuters)

An Afghan soldier is seen in a guard tower at a military base as civilians gather outside in Panjwai. (AP)

An Afghan soldier speaks to civilians gathered outside a military base in Panjwai. (AP)

A U.S. soldier, part of the NATO-led International Security Assistance Force (ISAF), stands outside a military base in Panjwai. (AP)

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.