Security has been tightened in New Delhi and adjoining Punjab and Haryana ahead of Independence Day celebrations on Monday.
Nearly 45,000 personnel have been deployed across the national capital.
Security has been stepped up all across the capital, including Red Fort and its environsin, shopping malls and places where people gather in large numbers. Police barriers have come up on scores of roads in Delhi to check vehicles and motorists.
Residential areas facing the Red Fort have been sanitized and police in Delhi and neighbouring areas have checked hotels and guest houses.
The Mughal monument and areas within a five-kilometre radius is being covered by about 9,000 security personnel from Delhi Police, paramilitary forces and the National Security Guard (NSG), and over 500 CCTVs have been installed in and around Red Fort. High-resolution cameras have been mounted on the sprawling monument.
Security has also been tightened across Punjab, especially in border districts, and Haryana and Chandigarh ahead of Independence Day.
A strict vigil is being maintained at important railway stations including Chandigarh, Ludhiana, Jalandhar, Amritsar, Panipat, Ambala, besides key inter-state bus terminals and other vital installations.
Police and other security personnel have intensified checking of vehicles in the two states and Chandigarh. Barricading and checking has also been intensified at the inter-state borders.
Meanwhile, Home Minister Rajnath Singh on Sunday reviewed the security situation in the country, particularly in Jammu and Kashmir, on the eve of Independence day.
Top brass of the security establishment briefed him on the prevailing situation in the country and the steps taken to foil any attempt by terrorists and other elements to disturb peace. The meeting specially reviewed the security scenario in Kashmir Valley, which has been witnessing unrest after the killing of Hizbul Mujahideen terrorist Burhan Wani.