Members of Rapid Action Battalion (RAB) detained four members of two pirate gangs from different areas of Patharghata near the Sundarbans in Barguna on Friday.
The detainees were identified as Rumi Sheikh, 28, son of Gaffar Sheikh and member of Sattar Bahini, and three members of Zakir Bahini--Emadul Akand, 27, son of Yunus Akand, Imran Khan, 28, son of Bablu Khan and Hasmot Ali, 37, son of Abu Hasan Sardar.
The elite force also recovered two locally made arms, 10 round bullets, a gun, four cartridges from their procession.
Four cases were filed with Patharghata Police Station in this regard, said its officer-in-charge Molla Md Khabir Ahmed, reports UNB.