Suicide bombers hit Afghanistan

In another suicide attack in the northern city of Mazar-i-Sharif, a civilian was killed and six others wounded.

Saturday's blast in Kabul was the third suicide bombing targeting the Nato-led forces in Afghanistan in two days.

"It was a suicide car bomb attack against a foreign forces vehicle," Alishah Paktiawal, the head of the city police's criminal department, said.

A spokesman for the Nato-led International Security Assistance Force (Isaf) said: "Right now we think it may have been a private convoy of private contractors."

He said that Isaf troops might have been attached to the convoy to provide security. One soldier could have been among the casualties but he could not confirm this yet, he added.

Firing

Following the attack, foreign soldiers shot dead a civilian and wounded three more, police said.

It was not clear why the US soldiers had fired on the crowd that gathered at the site of the suicide car bombing.

Zalmai Oriakhil, Kabul deputy police chief, said the shooting led hundreds of people to mob soldiers before Afghan elders and police intervened.

More