While most of these officers would cover the Republic Day parade route from Rajpath to Red Fort, special “interrogation teams” would also be deployed to remove any suspicious-looking person along the route and question them, sources said. The police have also called in “spotters” from militancy and Naxal-affected states such as Jammu and Kashmir, Punjab, Gujarat, Andhra Pradesh and Tamil Nadu.

Culled from police departments of various districts in these states, the “spotters” have already been deputed at various locations to identify suspects.

Among alerts the intelligence agencies have passed on, sources said, are a possible combined terror attack by the Lashkar-e-Toiba and Khalistan Commando Force (KCF) in the Capital on January 26. According to sources, the inputs mentioned that the two militant groups had a meeting recently in Germany, apparently to plan terror strikes.

The Mumbai police, sources said, had intercepted another input eight days ago that the Lashkar would target both Delhi and Gujarat on or around January 26. The agencies have also received an input that eight terrorists of Harkat-ul-Jehadi-Islami (HuJI) have sneaked in from the West Bengal border.

Officials said none of the threats have specific inputs about whereabouts of the militants but heavy force has been deployed. Besides Special Cell and Special Branch officers, officials from the Intelligence Bureau and Research and Analysis Wing (RAW) would be around the parade route and sensitive locations such as the Rashtrapati Bhavan, PMO, North Block, South Block, important hotels where guests are staying, and highrise buildings.

The bandobast:

* 196 companies of Delhi Police and 55 companies of central paramilitary forces, comprising around 35,000 police officials on R-Day duty

* 3 helicopters for aerial surveillance, besides NSG helicopters

* Anti-aircraft guns, anti-hit teams deployed at strategic locations

* Around 800 commandos of NSG, Indo-Tibet Border Police, and Delhi Police deployed on parade route and highrises

* Quick reaction teams (QRTs) and police vans on parade route and important locations