Army personnel conducted a drive in a den of United People Democratic Front (UPDF) and demolished its four barracks, two duty posts and a training centre at Jarulchhari in Khagrachhari early Saturday.
Tipped off, some army members of Dighinala zone conducted the drive at 5am.
They destroyed four barracks, two duty posts and a training centre, said Md Zahid Hasan, staff officer of Khagrachhari region of Bangladesh Army.
The UPDF members established a temporary base for training and were harassing locals extorting money and committing other crimes, he said.
Bullets were exchanged between the UPDF men and army men during the drive, he claimed.
Army personnel recovered their training materials and documents from the camp, said the army officer.