The arrestees are Afzal Hossain, 33, of Hamirkutsa, Zahidul Haq, 45, of Madhya Jhina, Chanchal, 20, of Jhikra, Emaj Uddin, 25, of Jhargram, and Abdur Razzak, 26, of Sripur villages.

On Wednesday, the law enforcers arrested two JMB men--Aftab Hossain and Abdus Salam--in the same upazila.

The officer-in-charge (OC) of Bagmara Police Station said the arrestees are listed JMB cadres.

They were associates of Siddiqul Islam alias Bangla Bhai and involved in so-called operations against outlaws in the upazila in 2004, he added.

At least 25 people were killed and several hundred maimed during JMB operations, led by Bangla Bhai, in the upazila.