The Hezb-i-Islami insurgent group on Thursday claimed responsibility for a suicide car bomb targeting a NATO military convoy in the Afghan capital Kabul that killed six civilians and injured dozens more. "Our comrades carried out this attack. We take responsibility. Ten foreigners were killed and two of their vehicles were destroyed," Zubair Sediqi, the Hezb-i-Islami spokesman, told AFP by telephone. NATO declined to comment on reports of foreign casualties.