Din Mohammad Darwish, spokesman for the Logar provincial governor, says the attack happened today morning in Baraki Barak district when a vehicle that two families were riding in struck a roadside bomb.
Darwish blamed the Taliban for planting the bomb. He says four women, two children and a man were among the dead.
No one immediately claimed responsibility for the attack but roadside bombs have been a weapon of choice for Taliban insurgents for many years.
They are often used to target officials and members of the security forces but also kill many civilians.