Two Americans killed, three wounded, by gunman in Afghanistan

Two Americans, a service member and a civilian, were shot and killed Wednesday by an Afghan wearing a military uniform at a base near Kabul, according to the U.S. and Afghan officials.

Three other Americans, a service member and two civilians, were wounded, officials said. They were reported hospitalized in stable condition.

It wasn’t immediately clear if the so-called “insider attack” involved a Taliban sympathizer, a personal dispute or a cultural misunderstanding.

The shooting comes as the Afghan government in Kabul has come under growing pressure from the Taliban and other armed insurgents despite 15 years of war.

The Pentagon has 9,800 troops...