Rapid Action Battalion (RAB)-4 has arrested a suspected member of the banned militant group Ansar-al-Islam in a drive at Mazar Road area of Darus Salam Thana in the capital on Sunday.
The arrestee was identified as Md Nibir Hasan alias Abdur Rahim, 19.Sajedul Islam Sajol, Senior Assistant Superintendent of Police has confirmed the news.
Nibir is an active member of Ansar al-Islam for last three years. He was working as an Admin of a messenger where some extremist post and videos were being circulated, he added.
Police have recovered books on extremism, leaflets and digital contents with extremism topics, mobile phones from his possession, Sajol said.
Legal action is underway in this connection.