A shadow of an Afghanistan National army soldier falls on a barricade on the outskirts of Kabul, Afghanistan, Monday, Sept. 21, 2009. Gen. Stanley McChrystal , the top U.S. and NATO commander in Afghanistan has reported to President Barack Obama that without more troops the U.S. risks failure in a war it's been waging since Sept. 2001.
The group was on a combined security patrol in the Wardak province in the central region of Afghanistan.
According to a spokesman for the Wardak provincial governor, the troops were killed by "an individual wearing an ANP uniform." After he opened fire, the officer fled the scene.
The AP reports a joint team of Afghan and American officials were investigating the attack.
"However tragic, this event will not hamper the close partnership and combined security efforts [between international and Afghan security forces]," said Zemarai Bashary, spokesman for the Afghan Interior Ministry.