Unprecedented security steps are in place ahead of the Independence Day and Hindu festival of Janmashtami following "specific inputs" of terrorist threats from intelligence agencies, Delhi Police said on Saturday.
With the US warning of possible Al-Qaeda assaults on Indian cities, Delhi will keep a close vigil on vital installations Tuesday with over 10,000 police personnel, commandos of the Indo-Tibetan Border Police and the National Security Guard.
"We have placed an unprecedented ground-to-air security apparatus on the eve of the annual Independence Day celebrations and the Janmashtami festival Wednesday," said Ajay Chadha, special commissioner (security).
"The recent blasts in Mumbai as well as a reported failed attempt by terrorists to simultaneously plant explosives in aeroplanes in the UK give credence to the intelligence report. With heightened terrorists activities, there is a considerable escalation in threat perception," Chadha told reporters.
About special inputs from intelligence agencies, he said the police have received a number of general inputs and "a few specific ones". The inputs include terrorist plans to "target prominent political leaders and symbols of national importance".
He said elaborate security arrangements have been made in and around the Red Fort, from where Prime Minister Manmohan Singh will address the nation Tuesday.
Special measures have also been taken at high-security zones of the capital like the Indira Gandhi International Airport, Parliament, the Inter-State Bus Terminal (ISBT), the Metro rail network, crowded markets and cinema houses.
Delhi Police will lay special stress on anti-sabotage and anti-explosive checks, tight access control and vigil on VIP routes.
Specialised units like special cell, crime branch, and special branch, security and traffic, will maintain security alerts against any "attempt of terrorist outrage".
Chadha said PCR (police control room) vans and motorcycles for strengthening patrolling and security vigil in and around the Red Fort were specially mobilised.
"All security personnel, including commandos, have been sensitised and briefed about the prevailing threats. We have visualised various contingencies that may arise in view of the threats from militants and have taken appropriate anti-terrorist measures," he added.
Suitable air defence measures have also been taken to counter possible threats. A close coordination is being maintained with the police of neighbouring states to avert any militant plan to sneak into the capital.
"Checking at all the borders is being further strengthened," Chadha said.