The NIA probed the link between the Burdwan blast and the Jamaat-ul-Mujahideen Bangladesh (JMB) over the past one month and also faced resistance from West Bengal government led by Chief Minister Mamata Banerjee initially.
Official sources said the NIA came across information about JMB activists across India and their links with Bangladesh. The agency came to learn after quizzing the arrested persons that at least 120 IEDs were transferred to Bangladesh four times. The idea was to disrupt the rule of the Awami League government.
On November 9, a Kolkata court remanded JMB commander Sajid, who is said to be the mastermind of the blast, in NIA custody till November 20. His aide Zia-ul-Haque was also arrested by the NIA from Malda district in connection to the explosion.
On Nov 11, a minor blast occurred in Kolkata to 'warn' against the probe
New Delhi also sought details from Bangladesh about the interrogation report of two JMB militants who were arrested in Dhaka recently. It will also ask Dhaka to take preventive steps to counter JMB's threat.
On Monday, Bangladeshi Home Minister Asaduzzaman Khan spoke about the NIA team's visit to Dhaka and said he had a talk to the Indian High Commissioner over the matter, a report in Bangladesh said.
He said the Bangladeshi government had given its nod to the NIA team's visit.