The blast hit the convoy during the morning rush hour in one of the busiest parts of Kabul. Public health officials said eight civilians were killed and at least 25 wounded, with a number of civilian vehicles that were near the convoy destroyed or badly damaged.
A spokesman for the US-led NATO mission, US Navy Capt. Bill Salvin, said three US service members were wounded in the attack. The vehicles, which are designed to withstand big blasts, were able to return to a base under their own power, he said.