Confessions of five members of the group were recorded by Dhaka Metropolitan Magistrate Harun-or-Rashid that continued from 1 pm to 8 pm relating to the murder of Ahmed Rajib Haider on February 15, 2013. Another four have been arrested for the attack on blogger Asif Mohiuddin.[8] They also claimed responsibility for the murder of three atheist bloggers, Avijit Roy,[9] Oyasiqur Rahman Babu,[10] and Ananta Bijoy Das,[11] and murder of Rajshahi University sociology professor AKM Shafiul Islam.[12]
According to the Terrorism Research & Analysis Consortium, the ABT is an Al Qaeda inspired Islamic extremist group in Bangladesh that started its activities during 2007 as the Jama’atul Muslemin funded by different NGOs. The group ceased to operate when funding ended. It resurfaced during 2013 as the ABT.[5] Ansarullah Bangla Team is a front group for AQIS.
A new report in 2013 identified Muhammad Jasimuddin Rahmani as the spiritual leader of a militant group in Bangladesh. He was inspired by Anwar al-Awlaki, who had been killed by the US. He was suspected of building an Islamist terror network in Bangladesh for about minimum 5 years. They shared their views on a website called “Ansarulla Bangla Team”. The server of the website was located in Pakistan. Muhammad Jasimuddin Rahmani was the Imam of Hatembagh mosque, Dhanmondi.[13] The organization has a presence on Facebook where it publishes propaganda and names its targets. Many of its supporters online are also supporters of Bangladesh Islami Chhatra Shibir and Bangladesh Jamaat-e-Islami.[14]
The ABT claimed responsibility for some of the prominent murders and attacks of atheist bloggers, including Ahmed Rajib Haider, Asif Mohiuddin, Avijit Roy, Oyasiqur Rahman, Ananta Bijoy Das and AKM Shafiul Islam.
On 21 November 2022, two of the men sentenced to death for the murder of Avijit Roy escaped from a courtroom in Dhaka, assisted by men on motorbikes armed with chemical sprays.[15]
The ABT was implicated in a bank robbery of a branch of the Bangladesh Commerce Bank LimitedinAshuliaofSavar on April 21, 2015. The robbery started at 3 pm, when 8-10 people entered the bank brandishing guns. According to witness reports, they tried to take Tk.5lakhs (US$6,400 as of June 2015) while holding bank officials hostage at gunpoint. However, as some of the officials obstructed the robbers, they were stabbed, injuring 5 of which 3 succumbed to their injuries in medical care:[16]
a bank manager,
a security officer and
a bank customer.
However, at that point, locals outside quickly used a nearby mosque with loudspeakers to announce the bank robbery. The robbers heard the announcements and started violently fleeing the area, using several rounds of shots, hurling molotov cocktails and grenades. This sudden outburst injured some 20 people; 3 of whom died immediately after hospital admission, 2 later while receiving treatment at around 8:30 pm and one more person on the next night.[16][17]
The robbers divided and fled the scene, some on foot and some on motorcycles. A mob quickly formed and caught 2 robbers on one bike and another robber in another area. In a mass beating of the two caught, the mob killed one and hospitalised the other – who later succumbed to his injuries. The police attempted to recover the robbers but this led to a clash and two police vehicles being vandalised. Arrival of police backup put the situation under control and the robbers captured.[16][18]
A total of 9 people were either killed immediately or succumbed to injuries sustained, and at least 14 others were at most injured by bullet-wounds from weapons used by the robbers. Interrogation of the captured robber(s) led to the arrest of more suspects; police found that several of the robbers were members of the ABT.
Al Amin Hossain (21 April 2015 arrest) – A robber caught by the locals
Mahfuzul Islam Shamim (30 April 2015 arrest) – The 'operation commander' of the Ashulia bank robbery, an ex-member of the banned Jama'atul Mujahideen Bangladesh and confessor of crimes including robbery and murder of a bKash vendor on 10 March 2015
Two others killed as a result of mass beating by a mob
Secret meeting attendees at Dhaka – 13 June 2016[21]
Md Mozahidul Islam – responsible for recruiting and inviting new members into (ABT), arrested via Detective Branch on a crackdown[22]
Md Ariful Islam Solaiman alias Arafat – responsible for recruiting and inviting new members into (ABT), arrested via Detective Branch on a crackdown[22]
Assam Police preliminary investigation tip-off - 24 April 2023[23]
The outfit was planned to be banned in 2013 alongside 9 others[26] but the ban on the ABT was not enacted at the time. After a police request for a ban following an investigation report of the bank heist two years later, the Ministry of Home Affairs officially banned them on 25 May 2015.[5][6][27]
^"Blogger Rajib's 'killers' linked to al-Qaeda: DB". The Daily Star. Transcom Group. March 15, 2013. Archived from the original on 2013-03-18. Retrieved June 2, 2015. The North South University students ... were working under a new-born extremist militant organisation 'Ansarullah Bengali Team'