An investigation into the killing of the most senior U.S. military officer since 9/11 found the incident could not have been `` foreseen '' or `` prevented , '' according to a military report out Thursday . Maj. Gen. Harold Greene , who was leading efforts to train soldiers in Afghanistan , was killed by a member of the Afghan National Army on Aug. 5 during a visit to a military training facility in Kabul . The report was from the International Security Assistance Force , which serves as NATO 's command over allied military operations in Afghanistan . Greene , along with more than 90 other US and Coalition personnel , visited the Marshal Fahim National Defense University to take a look at the construction of a site at the school that would serve officers in the Afghan Army . According to the report , overall security at the site was provided by Danish forces , but there were protection forces from the United States , United Kingdom and Germany also present . But despite `` extensive security planning '' for the event , the report said `` there was no comprehensive plan that incorporated all participating security elements , '' as each individual security detachment did their own preparation . `` The threat level that day was assessed as low , with no indicators of unusual activity or concern , '' the report said . ISAF identified the shooter as Rafiqullah , a soldier with the Afghan Army who entered the barracks at the university where the presentation was taking place and positioned himself in a nearby bathroom in direct view of the delegation and fired 27 -- 30 rounds in to the crowd . In addition to Greene , 18 others were seriously wounded . Two Coalition Force Soldiers returned fire and killed the shooter . `` Although there have been many leads , nothing has yet materialized that conclusively links the shooter to any plots , plans or person of interest , '' the report said . `` It appears the shooting was not pre-meditated , and the shooter simply took advantage a target of opportunity provided by the close gathering . '' The report raised the possibility the shooter may have been `` self-radicalized '' or suffered from some type of psychological condition . While visits to the site from various officials are a regular occurrence , the report said the incident appeared to be an `` isolated act of a determined shooter without indicators or warnings . '' ISAF made recommendations for greater risk assessment planning of such events and visits in the future , as well as a review of ISAF 's standard on the use of personal protective equipment .
Lt . Gen. Khan was killed by a member of the Afghan National Army in August . A spokesman said there was no way the killing could have been ` ` . '' The International Security Assistance Force authored the report .