A spokesman for the U.S. embassy in Afghanistan says an American citizen has been killed in an attack on a compound used by the U.S. Central Intelligence Agency .

The spokesman ((Gavin Sundwall) said Monday an Afghan employee of the U.S. government carried out the shooting attack late Sunday, and that the attacker was killed. Officials did not give a motive for the shooting.

Earlier, Afghan officials said gunfire was heard late Sunday near the Ariana Hotel, the CIA's station in the Afghan capital.

The incident comes less than two weeks after militants launched a coordinated assault on several high-profile targets in the capital, including the U.S. embassy and NATO headquarters. Nine people were killed in a nearly day-long siege.

In another incident Sunday, a suicide bomber blew himself up outside a local police headquarter in eastern Paktika province, killing two policemen and wounding two civilians.