Area from Habiganj District on the north to Kanaighat Police Station on the south along the 100 mile long border with India. The headquarters of the sector was initially at Karimganj and later at Masimpur.
• Major Chitta Ranjan Dutta (April 10, 1971 – February 14, 1972).
1. Jalalpur (Mahbubur Rob Sadi).
2. Barapunji (Captain A Rab & Lieutenant Amirul Haque Chowdhury).
3. Amlasid (Lieutenant Zahir).
4. Kukital (Flight Lieutenant Kader, Captain Shariful Haq).
5. Kailas Shahar (Lieutenant Wakiuzzaman); and Fazlul Haque Chowdhury EX EPR(from April 71 - August 71).
6. Kamalpur (Captain Enam).