The security measures were planned in the backdrop of intelligence inputs about Pak-based Lashker-e-Taiba acquiring over 50 para-gliding equipment which could be used to launch an air-borne suicide attack. A ground-to-air security apparatus has been put in place for the celebrations while over 15,000 security personnel kept a tight watch between Vijay Chowk and Red Fort, the 8 km long route through which the parade showcasing the country's diversity and military prowess passes through.

192 companies (over 15,000) police and paramilitary personnel are being deployed on the parade route. This is apart from the resources available with New Delhi and Central Delhi police districts. A senior police official said a multi-layer security ring was put in place at Rajpath.

Mobile hit teams, anti-aircraft guns and sharpshooters of the National Security Guards was deployed at various places. Snipers were deployed at high-rise buildings, specially on the parade route, while a total of 105 CCTVs have been installed to keep a vigil on people's movement between Rajpath and Red Fort.

"A special emphasis was laid on anti-sabotage checks, access control measures and intelligence coordination. The entire route of the parade was be covered by special security and anti-terror arrangements. Elaborate air defence measures, including deployment of anti-aircraft guns, have also been taken to check possible intrusion of air space," he said. Besides helicopters of the Indian Air Force will hover over the areas around Rajpath and all along the route of the parade, the official said.

Elaborate traffic arrangements have also been made for Tuesday. Vehicles were not be allowed to enter the parade route while Metro services was curtailed. Patrolling in crowded market areas has been intensified and checking and frisking in metro, railway stations and bus terminals tightened in the past few days.

Security at the IGI airport was also strengthened in coordination with the CISF. Checking and frisking have also been intensified at all entry points with police setting up barricades to keep a vigil on all those entering the capital.