Delhi will be under hawk-eye vigil in the run up to the Republic Day celebrations with thousands of policemen fanning out across the city and a massive ground-to-air security apparatus being put in place.
Mobile hit teams, anti-aircraft guns and sharpshooters of the National Security Guards will be deployed at various places while paramilitary and Delhi Police commandos will keep a close watch along the route of the Republic Day parade.
Snipers will be deployed at high-rise buildings while a total of 105 CCTVs will keep tight vigil on people's movement between Rajpath and Red Fort, the route of the parade which showcases India's military might and cultural diversity.
A multi-layer security ring was put in place at Rajpath, where President Pratibha Patil will unfurl the tricolour and take the salute of marching contingents.
South Korean President Lee Myung-bak will be the chief guest at the parade, which will also be attended by Prime Minister Manmohan Singh and the country's top political and military brass.
"A special emphasis is being laid on anti-sabotage checks, access control measures and intelligence coordination. The entire route of the parade will 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," a senior police official 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.
Other security measures like patrolling of crowded markets, checking and frisking in metro, railway stations and bus terminals have been tightened. Security at the IGI airport was also strengthened in coordination with the CISF, he said.
Checking and frisking have also been intensified at all entry points to the city with police setting up barricades to keep a vigil on all those entering the capital.
All prominent market places have been brought under close circuit television (CCTV) cover and private security guards employed by various market associations asked to extend total cooperation to police in maintaining a tight vigil.
All property dealers and second-hand car dealers have been asked to furnish details about their recent deals and pass on information especially about customers from outside the state. Cyber cafe owners have been directed to maintain the records of all e-mail users.
A meeting of the heads of police forces in Delhi and adjoining areas have already reviewed the security preparations in the National Capital Region and decided to increase sharing of intelligence and information regarding criminals and gangs operating in the region.