The NIA counsel prayed before the chief judge, city sessions court, M Mumtaz Khan, that it be granted Hakim's custody for 15 days so that it can interrogate him in connection with the blast.
Hakim was released from the state-run SSKM Hospital today after being treated for splinter injuries.
The central agency also prayed for judicial custody of other three arrested in connection with the case -- Hasem Mollah, Rajia Bibi and Alima Bibi.
The judge, after hearing the counsel, reserved the order, which would be delivered later in the day.