The Inter-Services Public Relations has been the only source of information with regards to the 6-month long military operation in the region.
It said that the air strikes targeted militant hideouts in the remote Tirah valley located near the Afghanistan border.
The fresh casualties put the militant death toll at nearly 100 in the three days after the brutal Pakistani Taliban attack on a school in the northwestern city of Peshawar.
The attack, which shook Pakistan and made global headlines, killed 141 people -- 132 of whom were children.
Khyber Agency, one of seven semi-autonomous tribal regions in Pakistan, is believed to be the new bastion of Pakistani Taliban militants.
They were forced to flee their former stronghold in North Waziristan due to a large-scale military operation launched in the mountainous northwestern region on June 15.
Over 1,600 militants and 100 soldiers have been killed in air strikes and clashes between the Pakistani army and the Pakistani Taliban in North Waziristan and Khyber Agency since June 15.