Officials said the digital ban was intended to disrupt ideological channels that facilitate cross-border radicalisation, particularly in areas where socio-economic vulnerabilities are exploited by extremist networks.
"Fake voter and Aadhaar cards have been seized from his possession. He is being interrogated. We are trying to find out how and when he entered into India," an official said.
Asadullah Sheikh, 35, alias Raja, a resident of West Bengal's Purba Burdwan district, was nabbed from his hideout in Chennai's Nilangarai area, he said.
Ziaul Hoque, Motiur Rahaman, Mohammad Yusuf and Jahirul Sheikh have been jailed for seven years and fined Rs 5,000 by the court which delivered the judgement on Tuesday, an NIA spokesperson said.
The Border Security Force has been put on high alert along the India-Bangladesh border in Assam and Tripura following intelligence inputs of Islamic terrorists planning to infiltrate the country.
With fresh inputs on the Burdwan blast indicating pan-India existence of Jamaat-ul-Mujahideen Bangladesh, Home Minister Rajnath Singh on Tuesday ordered immediate neutralisation of the terror modules of the banned group.
He was arrested near Tilbitha railway station in this district, the police said on Sunday.
The chief of the terror group blamed for Bangladesh's worst terror attack at a Dhaka cafe was among the four Islamist militants killed in one of the country's longest anti-terror operations in Sylhet, police said on Tuesday.
All the convicts belonged to outlawed Jama'atul Mujahideen Bangladesh.
'The NIA has shared with states concerned a list of 125 suspected activists who have close links with the JMB leadership'
13 of the 17 militants who were presumed to have plotted the attack were killed in encounters so far, said police.
The outfit has prepared a list of local Hindus and secularists who they plan to target.
Three more suspects have been arrested in Dhaka in connection with the blast in West Bengal's Burdwan, amid a joint Indo-Bangla operation along the borders to nab over 100 militants of the outlawed Jama'atul Mujahideen Bangladesh.
Sheikh Hasina's government has launched a relentless war against terrorism since the Dhaka cafe carnage in July 2016, but as Bangladesh's terror networks exploit new technologies and new tactics, the challenge to eliminate jihad gets tougher, points out Binodkumar Singh.
A team of the National Investigation Agency will be visiting Bangladesh on November 17 to brief the authorities in Dhaka and also seek cooperation of that country to unravel all plans of Jamaat-ul-Mujahideen Bangladesh terror outfit.
Noor-ul-Haque, alleged to be a financial brain behind banned Jamaat-ul-Mujahideen Bangladesh terror outfit, was nabbed outside Howrah railway station.
The suspected terrorist arrested from Viswabharati fast passenger train at Burdwan station has links to terror groups Islamic State and Jamaat-ul-Mujahideen Bangladesh, a top Crime Investigation Department officer said on Tuesday.
Establishment of Sharia rule by overthrowing the democratically-elected government in Bangladesh was the motive of Burdwan module of banned terror outfit Jamiat-ul-Mujahdieen Bangladesh, the National Investigation Agency claimed on Monday.
Starting with 10 terror modules in 2009, the Jamaat-ul-Mujahideen Bangladesh today has more than 50 units across West Bengal, reveal investigative officials.
The National Investigation Agency delegation visiting Bangladesh to investigate the Burdwan blast plot has provided some names and phone numbers in connection with the incident to security agencies.
Hoque said he alerted the chiefs of NIA and CBI against Chowdhury.
Security forces in the past 10 days have witnessed four major anti-militancy assaults against Islamic-State inclined Neo-Jamaatul Mujahideen Bangladesh in which seven people including an army lieutenant colonel and two police inspectors lost their lives while the assaults killed 15 militants and their children.
Procuring ration card, passport, voter ID cards and documents to establish their Indian citizenship are easy and sleeper cells help illegal immigrants in getting them.
Bangladeshi-Canadian Tamim Ahmed Chowdhury and dismissed army officer Syed Md Ziaul Haque have been identified as the brains behind the two terror attacks.
The National Investigation Agency on Saturday arrested Abdul Mazeed Momin, an absconder, in connection with the Burdwan blast, taking the total number of arrested persons to 17.
"The five terrorists killed at Gulshan (cafe) were JMB members. The police had their details and been looking for them for a while," Inspector General of Police AKM Shahidul Haque told media persons.
The Centre has imposed a ban on the Popular Front of India (PFI) and several of its associates for their alleged terror activities.
West Bengal with its porous borders has turned into an easy transit point and secure hideout for the agents of terror outfits like Jamaat-ul-Mujahideen Bangladesh and Pakistani secret service Inter-Services Intelligence.
In a prize catch, the wife of Burdwan blast prime accused and the chief of the women's wing of the banned Jamaat-ul-Mujahideen Bangladesh group was arrested on Sunday in Bangladesh along with three others.
The issue of erecting fences along the international Indo-Bangla border was in cold storage for last several years.
Highly-placed sources in the Assam police said that several jihadi elements from different areas of Assam were working for terror outfits after undergoing training.
'Now that an extremist organisation like the PFI has been banned, it is time for the leaders to reach out to the minority community.' 'You need to have co-ordination between the State and the social fabric to send out the message that it is not directed at the community, and they should not feel vulnerable.'
The National Investigation Agency has, in separate incidents, arrested two individuals in connection with the Burdwan blast case. The first arrest was that of Suzena Begum, wife of key accused Sahanur Alam and the second person arrested was Zia-ul-Haque, wanted for indoctrinating youth in sectarian ideology.
A woman and a teenage boy on Saturday blew themselves up in Dhaka when Bangladesh police's elite counter-terrorism unit raided a three-storey building where heavily-armed militants, belonging to an Islamist group blamed for the deadly cafe attack, were hiding.
Ten militants of a banned Bangladeshi Islamist outfit were sentenced to death ON Thursday by a fast-track court in Dhaka after they were found guilty of involvement in a deadly suicide bombing in 2005 that claimed eight lives.
The minister also said the Bengaluru-specific anti-terrorist squad (ATS) probably will be operational in November first week.
West Bengal has a 2,200 km porous border with Bangladesh over 10 districts.
Counter-Terrorism and Transnational Crime chief Monirul Islam said they got information that Jamaat-ul-Mujahideen Bangladesh chief Musa along with some other JMB terrorists are in Sylhet.
The All Assam Students' Union on Tuesday organised demonstrations across Assam demanding steps to evict fundamentalist forces from the state.
The terrorist was killed during a raid on a house in Dhaka's Rupnagar area and was identified by police as top Neo-Jama'atul Mujahideen Bangladesh leader Chowdhury's 'second-in-command'.