A suicide car bomber has struck a US military convoy in the Afghan capital, killing at least eight Afghan civilians and wounding three US service members in an attack claimed by Islamic State.
Najib Danish, deputy spokesman for the Afghan interior ministry, confirmed the toll and said a further 25 Afghan civilians were wounded in the morning rush-hour attack near the US embassy, which destroyed several civilian vehicles.
Isis claimed the attack in a statement carried by its Aamaq media division. An affiliate of the extremist group has gathered strength in recent years and is at war with the US-backed government and the much larger Taliban insurgency.
Afghan forces have struggled to combat both groups since the US and Nato officially concluded their combat mission at the end of 2014, switching to a support and counter-terrorism role. The US has more than 8,000 troops in the country.
The Taliban and Isis aspire to overthrow the Afghan government and impose a harsh version of Islamic law, but they are fiercely divided over leadership and tactics.