Rapid Action Battalion (Rab) has claimed to have detained a quack from Koyra upazila of Khulna.
Posing as a medical doctor, the accused, Mubarak Hossain, had been treating patients in the Orjunpur area of the upazila, according to a Rab release.
Acting on a tip-off, a team of Rab-6 conducted a drive in the area around 6pm on Monday and detained Mubarak.
The elite force also seized prescriptions, fake seals and pads from his possession.
Earlier, he was convicted for practicing without a medical degree by a mobile court in Barishal, the release added.