An Afghan employee killed a US citizen and wounded another in a "shooting incident" at an annex of the US embassy in Kabul on Sunday night, an embassy spokesman said.
"There was a shooting incident at an annex of the US embassy in Kabul last night involving an Afghan employee who was killed. The motivation for the attack is still under investigation at this time," US embassy spokesman Gavin Sundwall said on Monday.
The injuries to the second US citizen were not life-threatening, Sundwall added.
The annex is believed to be used by the Central Intelligence Agency, which has declined comment on the incident.