Members of Rapid Action Battalion (Rab) arrested a suspected member of banned militant outfit 'Allahr Dal' from Gangni upazila on Thursday night.
The arrestee was identified as Russel Ahmed, 30, a member of Allahr Dal and son of Abul Kalam Azad.
Tipped off, a team of Rab conducted a drive at his house in Garadob village of the upazila, according to Rab-6.
A case was filed with Chuadanga Police Station in this regard.