Police have also installed around 80 face-recognition cameras around the venue of Republic Day celebrations and at the city's entry points to identify any subversive or criminal elements.

Spectators have been made to pass through a stringent multi-layered security check to be able to watch the parade and they were not allowed to carry any electronic gadgets to the venue.

The 80,000-strong Delhi Police force assisted by another 20,000 drawn from para-military forces and state armed police were on vigil for last few days to prevent any untoward incident in the city. Specialised canine units of Indian paramilitary forces were deployed along with team of seven Belgian 'Malinois' dogs of the US Navy Seals which are accompanying the security personnel of the US.