Via the New York Times:
KABUL, Afghanistan — A United States Army major general was killed on Tuesday by an Afghan soldier, shot at close range at a military training academy on the outskirts of Kabul, officials of the American-led coalition said Tuesday. The officer was the highest-ranking member of the American military to die in hostilities in the Afghanistan war.
The coalition officials, who spoke on condition of anonymity and would not release the name of the major general, said an unspecified number of other service members of the American-led coalition and Afghan soldiers, including a senior Afghan commander, also were shot. Their conditions were not immediately known.
Other details of the shooting were sketchy, and the coalition, in an official statement, would only confirm that one of its service members had been killed in what it described as “an incident” at the Marshall Fahim National Defense University in Kabul. The coalition declined to specify any further details, saying it was still working to notify the family of the deceased.