Two Afghan soldiers and a civilian interpreter have been killed in south-eastern Afghanistan in a clash between rival factions loyal to the government.
The fighting broke out late on Monday in the Karar Gah area near the town of Spin Boldak, close to the border with Pakistan.
An Afghan police official said the fighting lasted several hours and only ended when US troops intervened.
The civilian was working for the US forces.
The clashes were between forces loyal to the district commander, Gud Fida Mohammad, and the commander controlling Spin Boldak, Abdul Razzaq.
From the newsroom of the BBC World Service