Nato and Afghan forces have clashed with Taliban fighters in the south, leaving three Taliban dead and three wounded, an official says.
Fazel Bari, the district chief, said the gun battle took place after a Nato convoy patrolling with the Afghan police and army in the Arghandab district of Zabul province was ambushed on Tuesday evening.
Bari said Nato and Afghan forces returned fire in a 20-minute gun battle that left three Taliban dead and three wounded, adding that no one from Nato or Afghan forces was hurt.
Nato's International Security Assistance Force did not immediately have any details on the incident.
Despite a large Nato presence, much of Afghanistan is being swept by anarchy and lawlessness.
The Taliban have apparently regrouped after being driven out of Kabul by US-led forces in November 2001 and have since stepped up attacks on Nato and Afghan forces.
A resurgent Taliban have also threatened a renewed offensive in coming months.