Rapid Action Battalion (RAB) arrested a top leader of banned Islamist outfit Jama'atul Mujahideen Bangladesh (JMB) along with his four associates from Sadar upazila railway station in Sirajganj on Friday morning.
The arrested persons were identified as Ehsar members of JMB Abdun Noor, also coordinator of Chapainawabganj district JMB, Noor Islam and Nuruzzaman Arif and Gayre Ehsar (hidden cadre) members Md Abul Kalam Azad and Faruk Ahmed.
Forty-nine primary detonators, 26 electronic detonators, four time bombs, 10 kilograms of power gel, 155 different kinds of circuits, 55 jihadi (provocative) books and one power regulators were seized from their possession.
Mufti Mahmud Hasan, legal and media wing commander of RAB, said that the chief coordinator of the banned militant outfit, Abdun Noor, along with other JMB members was going to Joydevpur from Chapainawabganj by a train.
The militants had planned to explode the explosives at different areas to show their existence and strengthen their networks, he said during a press conference on Friday.
The RAB official said Abdun Noor is the main coordinator of the banned militant outfit who maintained close connection with his followers now in jail and in hiding.
Acting on a tip-off a RAB team conducted a drive at the Syed Mansur Ali Railway Station around 2:30am Friday and detained them.
Major Maksud, deputy director of RAB media wing, said a huge amount of bomb, sophisticated bomb making materials, Jihadi books and other equipment were recovered from their possession.
Indian intelligence, investigating the Burdwan bomb blast case, claimed to have uncovered a JMB plot to assassinate Prime Minister Sheikh Hasina and BNP chief Khaleda Zia.
A good amount of explosives and bomb-making materials were found on them, the RAB officer said.
In October, police said the banned outfit was planning a massive attack across Bangladesh to grab international headlines.
India's National Intelligence Agency said it unearthed a major JMB plot to carry out attacks in Bangladesh.
RAB said it would brief the media over the arrests later.