At least eight people have been killed in a suicide bomb attack on a Nato convoy in southern Afghanistan's Helmand province, officials have said.

Two US soliders and an Afghan interpreter were among those killed in the attack in Gereshk district on Friday, according to Helmand's police chief.

A provincial governor had earlier said that 10 people had been killed in the blast.

The Taliban has claimed responsibility for the attack.

The incident came a day after Nato and Afghan forces said they concluded an operation to push Taliban-inspired fighters from villages in the Arghandab district of Kandahar province.

The US-led coalition said on Friday that two of its soldiers were killed while conducting operations against opposition fighters on Thursday.

"One coalition service member died of gunshot wounds and two others were wounded while conducting operations in Helmand province Thursday around 8pm [1530 GMT]," a coalition statement said.

The statement did not reveal the nationalities or identities of the victims.

The wounded soldiers were evacuated for medical treatment but one of them also died, the coalition said.