Five people have been killed by a bomb mounted on a motorcycle in Uruzgan province in western Afghanistan, reports say.
Three children and a woman are among the dead.
Taleban militants are active in the province. Earlier this year, 17 people, including 12 schoolchildren, died in a suicide attack in Uruzgan.
More than 3,000 people have been killed this year as Afghan and foreign forces battle Taleban fighters in Afghanistan.