'Children die' in Afghan bombing

They said at least one Nato vehicle was destroyed and some soldiers injured.

Elsewhere, US-led forces in southern Afghanistan say they have killed at least 24 Taleban fighters in a number of clashes.

They say that a civilian also died in one of four separate battles in the provinces of Helmand, Zabul and Kandahar.

There has been no independent verification of the reports.

A US-led coalition service member was also killed during a clash in the east of the country on Friday, the coalition said in a statement.

Correspondents say that the south of Afghanistan has been the centre of the Taleban's insurgency, with daily attacks on Afghan and foreign forces.

Civilians are often caught up in the fighting.

Meanwhile, Nato defence ministers meeting in Brussels have been discussing the high number of civilian casualties in the war in Afghanistan.

The BBC's defence correspondent says that although the ministers are concerned about civilian deaths, they are not expected to make any major changes to military tactics.

Around 2,000 Afghans - civilian, military and insurgent - are estimated to have been killed in Afghanistan so far this year.

The defence ministers said they would try to improve co-ordination between Nato, US-led and Afghan forces, but they laid the blame for civilian casualties on the Taleban, who they say deliberately draw fire into civilian areas.