The incident occurred at Tehrik-i-Taliban Pakistan's compound in Raj Gul area in Tirah Valley of Khyber Agency, sources said.
Meanwhile, two security personnel were injured in a roadside remote-controlled Improvised Explosive Device (IED) blast in Spinwam area of North Waziristan Agency.
Security forces were clearing land-mines along the road when the blast occurred, injuring two soldiers, official sources said.
The injured soldiers were shifted to the Combined Military Hospital Thall for medical treatment.