The seized documents also allegedly include jihadi literature pertaining to the Islamic State.
The NIA had recently achieved significant breakthroughs with the arrests of JMB’s Burdwan commander Sheikh Rehmatullah alias Sajid.
National Investigation Agency had last month nearly 40 improvised explosive devices linked to Burdwan blast suspects.
His actual identity has remained a missing link in the investigations into the October 2 blast.
The NIA had first filed charges against the 10 accused in the case on Nov 30 last year
The decision comes a day after the NIA announced cash rewards for information on 12 persons wanted in connection with the Burdwan blast case.
The NIA has almost completed its first phase of investigation in which it has seized several documents and identified the absconders.
The group allegedly belonged to Bangladesh-based Jamaat-e-Mujahideen Bangladesh, a banned terror outfit in the neighbouring country.
It will ask West Bengal government to hand over all the evidence collected by its CID department.
Union Home Minister Rajnath Singh made the decision following consistent demands from the state unit of the BJP.
BJP state president claimed that TMC did not want an NIA probe as its links with the terrorists would be exposed.
The NIA had proposed registering a case as a “preventive measure”.
The ISI organised training of IM operatives and also provided shelter to several accused persons.
Under the MLAT, either country can approach the other for collecting evidence against an accused.
NIA’s special prosecutor Subhash Bhattacharya told The Indian Express that the agency asked for time and the court granted it.