That "unknown source": he keeps killing civilians in Iraq and Afghanistan

"U.S. troops fired warning shots to disperse a protest in eastern Afghanistan over the arrest of a religious leader suspected of a rocket attack, NATO said Tuesday.  The alliance said no civilian injuries were reported from the protest Monday, but Gen. Faqir Ahmad, the deputy police chief of Parwan province, said one civilian was killed by shots fired from an unknown source." (thanks Olivia)