Three units of Central Industrial Security Force and Sector Headquarters of Border Security Force are located in the city of Thiruvananthapuram .
In addition to this 3 Units of Central Industrial Security Force ( CISF ) and Sector Headquarters ( SHQ ) of Border Security Force ( BSF ) is also present , Thiruvananthapuram also houses a large army cantonment in Pangode which houses some regiments of the Indian Army .
Thiruvananthapuram