The US team includes individuals with backgrounds in legal affairs, special operations, public affairs and aviation.

The Afghan Transitional Authority is also sending Major General Shir Mohammad Karimi to be an observer.

The BBC's correspondent in Afghanistan Damian Grammaticas said the attack on the wedding party in the central province of Uruzgan on 1 July was a major blunder by US forces.

According to Afghan authorities 48 people were killed and 117 injured in the attack.

The Americans say an AC-130 gunship attacked after four anti-aircraft guns were seen firing at US planes, including from the compound where the wedding party was hit.

The incident has severely strained Afghan-American relations and six local governors in parts of Afghanistan are now demanding that the US forces seek their permission before launching new combat operations.

And earlier this week, a US Special Forces compound in Tarin Kot, not far from the scene of the bombing, came under grenade and small arms fire.

The US military said it did not believe the attack was in retaliation for the incident with the wedding party.