KABUL: A suicide car bomber killed three Afghan civilians in Afghanistan's capital Tuesday, while four U.S. soldiers died during fighting in a northern province.
An Afghan police official said the attacker in Kabul struck a NATO convoy outside the military base at the international airport.
The Taliban claimed responsibility for the blast, which wounded another six Afghan civilians and three international soldiers - two Americans and a Belgian.
Also Tuesday, the U.S. military said four U.S. troops were killed while fighting insurgents in northeastern Kunar province. The French news agency said 10 Afghan soldiers also died in the clash.
Meanwhile, NATO acknowledged for the first time that Afghan civilians were killed in last Friday's air strike on two fuel tankers in northern Kunduz province and ordered a full investigation.
The commander of NATO's force in Afghanistan, U.S. General Stanley McChrystal, named a Canadian officer, Major General C.S. Sullivan, to lead the inquiry.