The Home Minister also said that the probe into the matter is on and forensic experts are affirming their findings about the nature of the explosives that were used in the blast.
He further added that the suspected e-mail sent by terror group, HuJI that was traced is also being probed.
Terror outfit, Indian Mujahideen earlier claimed that their outfit was responsible to carry out the blast. The case has now been handed over to the National Investigating agency (NIA) and Delhi police have formed three teams to assist them.
Replying further if he suspected the involvement of any terror outfit from across the border, PC said that it was difficult to comment but added that India lives in a troubled neighborhood as Pakistan and Afghanistan were terror hubs.
"At this moment, every organisation is suspected" and he was "keeping fingers crossed till we have evidence", said the Home Minister while talking about the third e-mail that was believed to have sent by IM.
"The person, whom we were looking for as a suspect, who sent the email, has been located and has been taken into custody for interrogation. We have to wait for that report to come," he said referring to the first mail that was sent from Kistwar.
The Sept 7 Delhi High Court blast left at least 90 injured and killing 13 people till now.