Indian security agencies have conveyed intelligences in Dhaka that the banned militant outfit Jamaat-ul-Mujahedin Bangladesh (JMB) had smuggled home-made explosives into Bangladesh.
Indian National Investigation Agency (NIA) confirmed after its month-long investigation that improvised explosive devices (IEDs) produced by  JMB at a clandestine bomb-making factory at Khagraghar in Burdwan were smuggled into Bangladesh, a highly placed source said on Wednesday.
The security agency, however, could not say when the IEDs entered Bangladesh. The anti-terror unit is yet to arrive at a conclusion regarding targets of such IEDs.
A senior official of a security agency in Dhaka admitted that they were reviewing the JMB terror operations.
However, the agency suspects that the IEDs may not be aimed at soft-targets. Instead the militants might have wanted to hit key point installations (KPIs), a competent source said.
The IEDs, according to Indian agency, include socket bombs widely used by Maoist rebels in Nepal during their 10-year long campaign.
It is believed that JMB operatives may have acquired the skills of developing and producing IEDs from the Nepali Maoists who have not surrendered to join the mainstream politics there, an official told this correspondent.
NIA informed Bangladesh anti-terror unit that the IEDs have entered through Hakimpur -Sathkhira, Bogobangola - Chapai Nawabganj and Lalgola - Rajshahi porous border areas.
This correspondent learnt that a high- profile NIA team will visit the porous border regions of Sathkhira, Chapai Nawabganj and Rajshahi during their possible visit to Bangladesh next week.