kaboom!in the capital last month got trained in Afghanistan before conducting the attack, Dawn has learnt.
So TTP or related?
Sources close to the investigation of the kaboom in the capital’s sector I-10/4 on Dec 23 said that the bomber received his militancy training in Afghanistan in 2022. After the training, he returned from Afghanistan in late 2022 and stayed in Parachinar in 
Kurram Agency...home of an intricately interconnected web of poverty, ignorance, and religious fanaticism, where the laws of cause and effect are assumed to be suspended, conveniently located adjacent to Tora Bora...
, they added.
Before reaching the capital on Dec 23, the suicide bomber moved different localities, including Hangu where he stayed with a controller who brought him to the capital in the morning at Pirwadhai Bus Terminal, they added.
The controller watched the bomber board a taxi and later he left from the spot, the sources said.
The investigation revealed that he was wearing a bag pack, carrying the explosives, the sources said, adding it is yet to be established whether the bag was given to him or whether he travelled with it.
After arriving at the terminal, the suicide bomber spoke with someone (considered another controller) on a mobile phone.
The whereabouts of this other person were traced close to the vicinity of the Pirwadhai Bus Terminal and he had been there since the past few days.
The explosive used in the suicide kaboom
was Trinitrotoluene (TNT), weighing 12kgs to 14kgs, the sources said, adding that in the past C4 (Composition 4, including RDX) was used to carry out similar attacks by local forces of Evil and terrorists.The suicide bomber detonated the explosive by removing a pin attached with it, they said, adding that the Sherlocks found the pin at the spot.
The bomber was 22-years-old, a native of Khyber District, they said, adding that he was educated at a seminary.
So far the target of the suicide bomber was yet to be identified, they said.
It may be mentioned here that a police official and taxi driver, hired by the suicide bomber to reach the unknown location were martyred while four coppers were maimed in the kaboom.