Chittagong District, Chittagong Hill Tracts, and the entire eastern area of the Noakhali District on the banks of the river Muhuri. The headquarters of the sector was at Harina.
• Major Rafiq-Ul-Islam
1. Rishimukh (Captain Shamsul Islam).
2. Sreenagar (Captain Matiur Rahman, Captain Mahfuzur Rahman).
3. Manughat (Captain Mahfuzur Rahman).
4. Tabalchhari (Sergeant Ali Hossain).
5. Dimagiri (Army Sergeant, name unknown to date).