U.S. official: Americans killed in Afghan attack _lowres

A NATO soldier, right, opens fire in an apparent warning shot in the vicinity of journalists near the main gate of Camp Qargha, west of capital Kabul, Afghanistan, Tuesday, Aug. 5, 2014. A man dressed in an Afghan army uniform opened fire Tuesday on foreign troops at a military base, causing casualties, an Afghan military spokesman said. (AP Photo/Massoud Hossaini)

WASHINGTON (AP) — A U.S. official says “about a dozen” of the victims of an Afghan insider attack on Tuesday were Americans, and at least one American was killed.

The official says many details of the attack early Tuesday were still unclear and the numbers could change. The official spoke on condition of anonymity because the official was not authorized to discuss details of the attack by name on the record.

A man dressed in an Afghan army uniform opened fire on foreign troops at Camp Qargha, a base west of the capital, Kabul. Among the wounded was a German brigadier general.

Gen. Mohammmad Zahir Azimi, a spokesman for Afghanistan’s Defense Ministry, said a “terrorist in an army uniform” opened fire on both local and international troops. Azimi said the shooter had been killed.