"We claim responsibility for the blast. This is our first response since the death of our chief Baitullah Mehsud. We will continue similar attacks in the future also," TTP spokesman Azam Tariq told a foreign news agency over phone from an undisclosed location.
Tariq said all those who were killed in the attack were supporters of US policies, The Dawn reports.
On Thursday, Aug 26, a group called 'Dr Abdullah Azzam Brigade' had claimed the responsibility for the strike.
Meanwhile, all 22 Khasadar Force personnel, who were killed in the attack, were cremated in Brag and Karamna villages of Bazaar-Zakakhel late on Friday.
On Friday, Aug 22, Khasadar Force personnel killed in attack were in Brag and Karamna villages of Bazaar-Zakakhel.