A video of the former ISI officials Colonel Imam alias Sultan Amir Tarar and Khalid Khwaja and journalist Asad Qureshi were recently released by the group which identifies itself as Asian Tigers.
The outfit sent an email to the Pakistan media demanding the release of top Afghan Taliban leaders Mullah Abdul Ghani Baradar, Mullah Mansoor Dadullah and Maulavi Kabir including a $10 million as ransom for Qureshi's release.
In the video the outfit threatened to execute the hostages if their demands were not met in the next 10 days.
Informing that the former ISI officials were 'in Taliban custody', the oufit termed them as 'enemy of Islam and Muslims'.
They added that they would hand over the list of names of the 'other mujahideen', whom they want to be released, in the coming days.
The three men, who were working on a documentary, had gone missing after travelling to North Waziristan on Mar 25 to interview Taliban leaders.
They were reportedly asked to come to the tribal areas by Punjabi Taliban militants.