The attack happened during the morning rush hour on a road in in the southwestern part of the city. Several civilians were among the dead. It was the second such suicide bombing in Kabul since Tuesday, when a Nato convoy was targeted close the main airport. That attack wounded more than 20 Afghans and coincided with a visit by U.S. Defense Secretary Robert Gates to assess the rising violence. Gates again called on NATO partners in Afghanistan to dedicate more resources to the war effort. Afghan military officials say they need more training and equipment to fight the Taliban insurgency.