A team of the Intelligence Bureau, along with their US counterparts, have secured all the areas where the President would be in. Mock drills are being conducted around all the places that the President would visit, including Parliament.

The drills will continue till the last minute, sources said.

Delhi will also see scores of snipers all over to guard the President of the US.

The security is multi layered and security forces comprising nearly 300 personnel from the US will form part of the first ring of the security. The other rings will comprise members of the Delhi Police, NSG Commandoes and other personnel numbering over 2000.

The Delhi Police have advised the people not to venture out into areas where the President's convoy will be moving by.

All these roads will be out of bounds for the public until the President's convoy passes,  officials said.

The Indian Air Force too has been pressed into service and will remain on stand-by until Obama leaves the city.

The Maurya Sheraton has been declared as a no flying zone. Hotel personnel have been advised to stop the virtual tour services on their web site until the President leaves.

The entire area will be out of bounds until the visit is over, Delhi police officials said.

IB inputs had suggested disturbances from those parts of Delhi like was done just ahead of the Commonwealth Games.