The Afghan Interior Ministry has condemned a suicide attack in northern Afghanistan as a “heinous act”.
Officials say the 29 people killed by the car bomb near Kunduz were civilians.
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.