A young female diplomat is among the six Americans who died in a pair of militant attacks in Afghanistan on Saturday.
An Afghan doctor was also killed. It was the deadliest day for the United States in the war in eight months.
Officials and the State Department says the three U.S. service members, two U.S. civilians and the doctor were killed when the group was struck by an explosion while traveling to donate books to students in a school in the south.
Secretary of State John Kerry says the Americans included a department of defense civilian and the foreign service officer.
Kerry says the diplomat "tragically gave her young life working to give young Afghans the opportunity to have a better future." He goes on to say "We also honor the U.S. troops and Department of Defense civilian who lost their lives, and the Afghan civilians who were killed."
The U.S. military says another American civilian was killed in a separate insurgent attack in eastern Afghanistan.