He was moved to an unknown place by the CTD for more investigation into the matter.
This group was also involved in the stock exchange attack, said the SSP West.
The Counter-Terrorism Department (CTD) of Sindh police on Wednesday claimed to have arrested a wanted criminal during a raid.
The security agencies have also found similarities in the Pakistan Stock Exchange (PSX) and Chinese Consulate attacks in Karachi.
A huge cache of explosive material was seized
Both terrorists belonged to the TTP Ustad Aslam group.
Police's Counter-Terrorism Department (CTD) on Monday claimed to have arrested a suspected terrorist of a banned outfit in Bannu area of Khyber Pakhtunkhwa.
Arms and explosive material were also recovered from his possession.