Here is the responsibility link.
This South Asia Group is a Indian think tank.
Let me correct them the explosives also contained Aluminium powder,it wasn't a simple RDX and TNT mixture.It was Torpex a military grade explosive.It has to be prepared by some experts.It not something Al-Qadea or it's Harkat-ul-Jihad-al-Islami.
So these think thanks either doesn't read the Rehman Malik's press briefing clearly or they have some other intention.
Fadayeen is common word written in files at lodhi road.