A suicide bomber in a car targeted two vehicles carrying foreign forces in the Afghan capital, Kabul, on Thursday killing at least six Afghan civilians, Afghan officials said.
It was not clear if any members of the foreign force were killed or wounded.
The Hezb-e-Islami insurgent group, allied with the Taliban, claimed responsibility for the attack. A spokesman for the militants told Reuters U.S. military advises were the targets.
The powerful blast took place at around 8 a.m. (11.30 p.m. EDT Wednesday), during the morning rush-hour, and caused heavy damaged to mud-built houses in the vicinity.