Police said that in a suicide bombing at a checkpoint - checkpoint, four members of the Pakistani security forces were killed and five were wounded, the Associated Press reported, quoted by BTA.
The car bomb attack took place in the Mir Ali district of Khyber Pakhtunkhwa province, police official Amjad Khanand said, adding that the injured were in a critical condition.
There was no immediate claim of responsibility for the terrorist attack, but suspicions likely fall on the Pakistani Taliban, who operate in Khyber Pakhtunkhwa and target security forces.
Interior Minister Mohsin Naqvi condemned the attack and offered his condolences to the families of the victims.
In another incident, also in Khyber Pakhtunkhwa province, a military convoy in Tank district was attacked with a remotely detonated roadside bomb. No casualties were reported.