Nearly 7,000 security personnel, including commandos from the National Security Guard (NSG), are being deployed at India Gate, Rajpath and Vijay Chowk ahead of International Yoga Day on June 21.
Intelligence agencies have also warned the Delhi Police and other security agencies of a possible aerial attack and that banned terror outfits could try to create trouble during the event.
Following the IB alert, the Delhi Police has banned flying of kites, balloons, gliders and micro-light objects during the programme. The use of drones for aerial photography has also been banned.
Delhi Police have already installed CCTV cameras across India Gate, including at vulnerable spots. Around 18 deputy commissioners of police will be deployed in the area to maintain law and order. They will barricade all eight arterial roads that lead to India Gate on Sunday.
The 35-minute event organised by AYUSH Ministry is scheduled to begin at 7.30 am on Sunday.
Thousands of school children, members of the armed forces, National Cadet Corps (NCC), government officials and yoga enthusiasts will perform at Rajpath.
Meanwhile, traffic restrictions have been in place since June 14. Rajpath has been closed for traffic from Vijay Chowk to India Gate and round-the-clock vigil of the area, including the lawns, has been on.
The area restricted for public will be bounded by Mother Teresa Cresent, Baba Kharak Singh Marg, Outer Circle Connaught Place between Baba Kharak Singh Marg and Barakhamba Road, Bhagwan Dass Marg, Mathura Road, Lodhi Road, Aurobindo Chowk, Safdarganj Road, Kamaal Ata Turk Marg, Kautilya Marg and Sardar Patel Marg upto 11 Murti.