A suicide bomber drove his explosives-laden car into a Nato-led force's convoy in southern Afghanistan, killing one soldier, the force said.
A purported Taliban spokesman claimed responsibility for the attack.
US-led coalition troops and Afghan forces, meanwhile, raided a building in south-eastern Afghanistan today, killing three suspected al Qaeda members, officials said.
The suicide attack occurred on the highway in the Spin Boldak district of the southern Kandahar province when the bomber in a white Toyota Corrola attacked a military convoy, a statement from the force said.
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The nationality of the killed soldier was not released. Most of the soldiers in the area are Canadians.