Monday's attack was the second suicide bombing in four days against border police in the area of Spin Boldak. — Photo by Reuters

KABUL: A suicide car bombing against a border police vehicle in troubled southern Afghanistan killed three border police guards, local authorities said.

Monday’s attack was the second suicide bombing in four days against border police in the area of Spin Boldak, a town near the Pakistan border in the province of Kandahar.

On Friday, a Taliban bomber targeting a senior border police officer killed 17 people and wounded 23 when he detonated his explosives in a bathhouse where men were washing before Friday prayers.

Border police chief commander Abdul Razaq said the suicide car bomber on Monday struck the border police vehicle on a road between Spin Boldak and Kandahar city.