The incident took place after a suicide bomber detonated his explosives near the provincial council compound.
Provincial governor media office following a statement announced, at least 13 people including provincial council chief Mohammad Rasoul Mohisi were killed and 9 others were injured following the incident.
In the meantime public health department officials said at least 14 people including Mohammad Mohsini were killed following the blast.
Afghan president Hamid Karzai strongly condemned the attack and called it a cowardly act against all Islamic teachings and human values, labeling its perpetrators as enemies of the people of Afghanistan who acted on orders by their foreign masters.
No group including the Taliban militants has so far claimed responsibility behind the incident.
There has been a considerable growth in violence across the country since Taliban group announced its summer offensive in April, and vowed to carry out attack on Afghan and coalition security forces, government officials and diplomatic institutions.