Security forces said they stopped an attempt to cross from Afghanistan in Kurram, killing 12, while Naib Subedar Hidayat Aman, 40, from Ghizer was martyred.
ISPR said troops foiled an infiltration from Afghanistan in Kurram and killed 12 fighters.
Naib Subedar Hidayat Aman, 40, from Ghizer, was martyred in the firefight.
The military said Afghan Taliban posts opened fire in support of the infiltrators.
A clearance operation is under way, and ISPR said Azm-e-Istehkam will continue.
Punjab Chief Minister Maryam Nawaz Sharif praised the forces and condoled with the soldier's family.