A team of Counter Terrorism and Transnational Crime unit (CTTC) held an IT chief of banned militant outfit Ansarullah Bangla Team (ABT).
The arrestee was identified as Ashfaq-ur-Rahman Ayon alis Arif alias Anik.
The law enforcers arrested him from Vatara thana in the capital on Monday night.
Masudur Rahman, Deputy Commissioner of Dhaka Metropolitan Police (DMP), confirmed the matter to the Jagonews24.com.