A ground-to-air security apparatus was put in place in the capital on Sunday with thousands of armed personnel keeping a tight vigil to thwart any possible terror strike or untoward incident during the Republic Day celebrations.
Snipers with sophisticated arms and binoculars were on rooftops while hundreds of police personnel kept watch on the 8-km-long parade route from Rajpath to Red Fort.
Around 25,000 police personnel, including from paramilitary forces and elite National Security Guards (NSG), were deployed across the city.
Mobile hit teams, anti-aircraft guns and sharpshooters of the NSG were also on the job at various places while paramilitary and Delhi Police commandos kept a close watch along the route of the parade, set to show India's military might and cultural diversity.
Snipers were on top of high-rise buildings while around 150 CCTV cameras kept a tight vigil on people's movements on the parade route.
Elaborate air defence measures, including deployment of anti-aircraft guns, were also put in place to secure the air space.
No vehicles were allowed to ply on Rajpath from 6 PM yesterday while vehicular movement was restricted on Tilak Marg, Bahadurshah Zafar Marg and Netaji Subhash Marg up to Red Fort from 4 AM today.
Security personnel identified vulnerable spots like crowded markets, railway stations, bus stands and other high-value establishments and efforts were made to secure them. Traffic police deployed around 1,500 personnel to manage route diversions during the parade.
Patrolling in public places was intensified and checking and frisking in metro, railway stations and bus terminals tightened.