Herat Police commander Colonel Obaidullah Noorzai was injured in a roadside bombing during a clash between the security forces and the Taliban in Pashtun Zarghun district.
The Afghan security forces convoy had been trying to clear Taqcha village in the district, when the car hit the mine.
Local officials claimed a civilian was killed and at least eight Afghan security forces and two civilians were wounded during the clash.
Six Taliban members were also killed while three others were wounded.
Taliban has yet to comment.