At least five civilians have been killed in a suicide car bomb attack on a Nato convoy in southern Afghanistan, Nato officials say.
US troops in Kandahar at the scene of Friday's blast
Two Nato soldiers were also wounded in the attack in a residential area in Kandahar city.
This comes a day after at least 16 people were wounded in two explosions in eastern Afghanistan.
Afghan officials say about 700 people have been killed or wounded in suicide attacks in the past year.
"There was some sort of explosion, we don't know exactly the cause. It struck [the Nato convoy] in the middle of the city," Squadron Leader Jason Chalk told the AFP news agency.
Afghan officials put the death toll at at least seven civilians.
The Nato spokesman would not give the nationalities of the wounded Nato soldiers.
There have been a spate of suicide bombings in Afghanistan in recent months.
On a single day last month, suicide bombers struck in three different parts of Afghanistan, killing at least 17 people and wounding 25 others. The dead included four Canadian troops.
Afghan officials say they suspect that Taleban and other militants opposed to the US-backed government in Kabul may be importing tactics used by insurgents in Iraq.
Correspondents say the insurgency in Afghanistan continues to deepen, and the pressure on the international community is increasing.
The violence has been most fierce in the south and east of the country.