Officials say the 29 people killed by the car bomb near Kunduz were civilians.
Death Toll Climbs to 29 in Kunduz Suicide Attack http://t.co/63sxlnEftD pic.twitter.com/5SOBmhYKcE— TOLOnews (@TOLOnews) 9 Août 2015
But local officials say they were members of a pro-government militia.
There has been a sharp increase in Taliban attacks in Afghanistan.
More than 50 people died in three separate attacks in Kabul on Friday alone. A NATO base and a police training academy were targeted. A truck bomb was also detonated.
Experts think they could be evidence of a power struggle following news of the death of Taliban leader Mullah Omar two weeks ago.
The news has cast uncertainty over the already fragile peace talks.