A suicide car bomber has killed 37 civilians in an attack targeting Canadian troops in the Afghan border town of Spin Boldak.
It was the second major suicide attack in two days after a blast yesterday in the city of Kandahar killed more than 100 people in the deadliest such attack in Afghanistan.
A spokesman for the Taliban said it had carried out the blast.
NATO's International Security Assistance Force confirmed that three of its soldiers were also wounded in the powerful suicide blast in a car parts market about 50m from the Pakistan border.
The Canadian military confirmed it had a NATO-led convoy in the area but would not say if it had been involved in any incident.
The blast also wounded 30 people and caused a fire which destroyed a vegetable market.
People in Kandahar were mourning those killed in yesterday's suicide attack, which tore through a crowd of hundreds of men watching a dog-fighting match.
