'As the country's top leadership are expected to be in full attendance at the Red Fort on the Independence Day, the historic monument would be turned into a citadel. For starters, the entire Red Fort complex is being sanitised. We are constantly reviewing and updating security arrangements,' the official added.

Police said the vehicular movement will be limited in the area Aug 14. Patrolling will be intensive in the walled city and snipers will be deployed at all vantage buildings around the 17th century red sandstone fort.

A special stress is being given on anti-sabotage and anti-explosive checks, tight access control and vigil on the VIP routes. Quick reaction teams are also in place. According to police officials, over 5,000 security personnel would be part of the security arrangements.

'Anti-sabotage checks are being carried out by the CRPF (Central Reserve Police Force), NSG (National Security Guards) and CISF (Central Industrial Security Force) along with Delhi Police in the area around the venue. All VIP routes will be checked and sealed,' said another security official.

'Closed circuit television cameras (CCTVs) will be put up at all vantage points.'

Besides, suitable air defence measures have also been taken to counter possible threats.

'The capital will be declared a no-fly zone for the morning of Aug 15 and air defence guns would be placed at strategic locations to ward off possible aerial attacks by unmanned or micro light aircraft,' said an intelligence official.