Hanging body of an Ansar member was recovered from his workplace in Baghaichhari upazila of the district on Sunday.
The deceased identified as Shakil Hossain, 23, was a generator operator of the Ansar-18 and also son of Alok Hossain of Dhamrai in Dhaka.
Anwar Hossain Khan, Officer-in-charge of Baghaichhari Police Station, said the Ansar member committed suicide hanging from a ceiling fan with dish cable at the generator office where he used to work in the midnight of Saturday.
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On information, they rushed to the spot and recovered the body and sent to Rangamati General Hospital morgue for autopsy, he said.
Md Sohag Parvez, commandant of the Ansar-18, said the reason for the death will be known after the autopsy and the body will be handed over to his family after ending all legal procedures.