It is perhaps for the first time that the Centre has taken a suo motu decision to hand over a probe into a bomb blast case in any part of the country to the National Investigation Agency (NIA) since this premier agency was created in 2008 after the Mumbai terror attack.
The BJP and CPI(M) while demanding that the Centre hand over the case to NIA has alleged that the Mamata Banerjee government was trying to hush up the matter. The BJP also accused the state government of "resisting" a NIA probe.
A notification was issued under the NIA Act and the agency will be registering an FIR tomorrow, the sources said.
The Union Home Ministry had received reports from central agencies and the state government about the incident in which two suspected militants -- Shakil Ahmed and Sovan Mandal -- were killed and another man Hasan Saheb was injured in the explosion on October 2 at a house.
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"We have informed the Centre about the incident and no opinion has been given from the state government side", a highly-placed state government source said in Kolkata.
"The Centre has the powers to initiate a suo motu probe in this regard and this is what the Ministry of Home Affairs has done", the source said.
The source further said, "The state government has the copy of the MHA order dated today which clearly says that NIA has taken up the matter to probe suo motu.
The state government, which appeared to be initially reluctant to accept that the incident in Burdwan had suspected terror links, handed over the case to the state CID after material collected from the blast site showed that some terror group was assembling bombs in the house and planning to carry out a strike.
Grenades, chemicals used in making explosives, a book on how to trigger explosion, jihadi literature, a video on jihadi training and a map of important locations in Burdwan district were seized by a CID team from the house where the blast occurred.
Four persons, including two women, have been arrested so far in the case.