The militants were hit this morning in the Khyber district.
Pakistan Army did not give any details about the identity of those killed and the toll could not be verified through independent sources.
The Khyber region bordering provincial capital Peshawar was stronghold of Mangal Bagh who overlords Lashkar-e-Islami militants.
Bagh is an ally of Taliban and is regularly targeted by the security forces.
Pakistan is fighting Islamist insurgents who have killed more than 55,000 people in the country in more than a decade of fighting.