Tamim had been identified as Islamic State’s operational leader in Bangladesh and was also known by the nom de guerre Abu Ibrahim al-Hanif. Operation Hit Strong 27, a precision sting operation on a residential building in Narayanganj, left three suspected militants including Tamim dead. The impression I get is that Tamim happened to be useful to them, and came along at the right time. B: The succession will likely be decided by IS central command since they were they first to announce Tamim Chowdhury as the leader of the IS chapter in Bangladesh. Tamim likely knew his days were numbered and wanted to die a martyr.

Source: Dhaka Tribune August 27, 2016 19:18 UTC