Security was enhanced near the residence of VIPs, Raj Bhavan, Civil Secretariat, Assembly House and patrolling was intensified in the remote and hilly areas by Tripura State Rifles (TSR), the sources said.
The BSF has intensified its vigil along the 856-km long international border with Bangladesh.
Bomb and dog squads were making regular checks in vulnerable areas and the vehicles entering the towns including the capital city are also being checked to thwart any attempt of carrying fire arms or explosives, they said.
The NLFT, United Liberation Front of Assam (Independent), National Democratic Front of Bodoland (Songbijit), Hynnewtrep Liberation Council (of Meghalaya), Kamatapur Liberation Organization and a few Manipur-based groups have given the boycott call.
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Assam Rifles personnel were deployed for patrolling in Kanchanpur sub-division of north Tripura district bordering Mizoram where NLFT insurgents are active, police said.
The CRPF was engaged in guarding the national highways as well as sensitive interior pockets.