Abdul Shayeq Shoresh Kohistani, a spokesman for the provincial headquarters confirmed that the explosion took place in Alasai district on Friday, MENAFN reported.
He said the militants detonated a remote-controlled improvised explosive device in a market which killed 3 civilians and wounded five others.
Anti-government armed militants including Taliban have not commented regarding the explosion so far.
Taliban and other militant groups frequently use improvised explosive devices as the weapon of their choice to target the security forces and government officials.
However, the roadside bombings normally inflict casualties on ordinary civilians.