According to local government officials, the incident took place around 7;00 am local time while the Taliban militants were busy planting Improvised Explosive Device (IED).
The officials further added that the militants wanted to plant IED on a roadside in Maiwan district.
The Taliban militants group has not commented regarding the incident so far.
Anti-government armed militant groups are frequently using Improvised Explosive Device (IED) as the weapon of their choice to target Afghan and coalition security forces.
IEDs are one of the major contributor of civilian casualties in Afghanistan.
According to UN, Improvised Explosive Devices used by Anti-Government Elements, were the second leading cause of civilian casualties in 2014.
At least 1,463 civilian casualties were reported in IED attacks during the first six months of the year, up seven per cent from 2013 and the highest number of civilian casualties from this tactic recorded in a six month period since 2009, the UN said following a report.