The operation was launched soon after the terrorists kidnapped four policemen from Buner on Tuesday.
The law enforcing agencies had recovered three bodies of the security personnel from the mountain.
On December 30, a security official was also killed while two others were severely injured in the bordering region of Federally Administered Tribal Areas (FATA) in two separate improvised explosive device (IED) blasts in Safi tehsil of Mohmand Agency.
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