Members of Rapid Action Battalion (Rab) arrested a member of banned militant outfit Ansar Al Islam on Friday from Fatullah in Narayanganj.
The arrestee was identified as Ali Sayfi, 24, son of Ali Ashraf from the Talla Ajmeri Bagh area falling under Fatullah model police station, said police.
Rab-3 handed over the arrestee to police on Friday night and filed a case in this regard at Fatullah model police station, said Kazi Masud Rana, inspector and investigation officer in the case.
According to the case complaint, Sayfi got information about extremist organization Al Qaeda from the internet in 2018. Later he started spreading extremist ideology along with Taki and Mohibullah from the Misbahul Ummah Hifz Madrasah in Ajmeribagh, as an Ansar Al Islam member.
During the arrest Rab recovered an Android phone, SIM cards, pen drive and extremist literature he used to promote extremist ideologies, said the inspector.
Sayfi was produced before a court with a seven day remand prayer on Saturday but a hearing on this regard will be held on Sunday, he said.