NATO forces killed two Afghan guards and seized weapons in a raid on a compound belonging to a private security firm in Kabul, an Afghan government spokesman has said.
The raid is said to have happened overnight and to have been conducted by a unit from the NATO-led International Security Assistance Force (ISAF) without coordination with Afghan troops.
An Afghan interior ministry spokesman, Zemari Bashary, said three people were also wounded in the raid.
He said an investigation was underway but gave no further details.
The use of "night raids" on private homes by foreign troops hunting insurgents has long angered Afghan officials.
Under new rules, raids must be cleared by Afghan authorities first and must involve Afghan troops.
compiled from agency reports