NATO has confirmed that a US police adviser has been shot dead by an Afghan policewoman.
The attack happened at the police headquarters in the capital Kabul.
Officials think the suspect has links to the Taliban. She has been arrested.
The shooting is the first incident against foreigners by a woman serving in the national security forces.
The death is the latest “insider attack” in which Afghan soldiers or police officers turn their weapons on Western troops they are supposed to be working with.
At least 52 NATO soldiers and advisers have been killed this year in similar incidents.
The shootings have undermined the smooth handover of security operations ahead of the pullout by most NATO combat troops in 2014.
The attack came on the same day a local police commander shot dead five Afghan police officers in the northern Jowzjan province.