Arif Noori, a spokesman for the provincial governor, says women and children were among those killed in Monday's blast, which also wounded three people.
He said the bomb was planted by the Taliban. The insurgents mostly target security forces and government officials, but their roadside bombs often kill civilians.
Noori says that elsewhere in Ghazni, at least three local police and 10 Taliban were killed in clashes.
The Taliban have agreed to a three-day cease-fire to coincide with a Muslim holiday later this week.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)