Intelligence agencies were busy holding meetings on Wednesday after a warning from the US about a possible 26/11 re-run by Hafeez Saeed.
On Monday, a day before the Peshawar school attack, the US intelligence shared specific inputs with India about this plan.
On Wednesday, the Multi-Agency Centre (MAC), joint intelligence committee (JIC) and IB discussed the issue at length and all security arrangements in the capital were reviewed.
Saeed's Jamaat-ud-Dawa (JuD) and Lashkar combine's plan is to target two unspecified hotel lobbies in New Delhi and an unspecified area on the highway between Delhi and Agra, the IB said in a report on Tuesday, based on CIA inputs.
The main orchestrator of the 26/11 Mumbai terror attacks, Saeed's plan is to attack vital targets and blame Indian intelligence agencies.
The IB report pointed out that Saeed has told Pakistani citizens and media that Indian agencies would carry out some attacks in India very soon and blame it on Pakistan's ISI.
Indian agencies are wary of an attack preceding US president Barack Obama's visit during the Republic Day as it would get terrorists maximum international attention.
Despite being declared as a terrorist organisation and proscribed by the UN, JuD continues to function in Pakistan in the garb of a charitable organisation.
The LeT, sources said, has the key support of about 23 Indian Mujahideen (IM) terrorists who had fled to Pakistan after a crackdown by Indian security forces. The help to carry out the attack that the CIA warned about could come from the IM sleeper modules that may in touch with them, sources added.
Working on the plausible scenarios, agencies have, in particular, sounded a high alert for public functions for the next two months that will be frequented by VVIPs.
Putting public places with high footfalls, public transport, including railways and schools on high alert, the Union home ministry advisory to state governments and UTs says, "Such attacks can only be prevented if central and state intelligence agencies mobilise all resources and assets and focus on collecting actionable intelligence."
"It is requested that law enforcement agencies should take all measures towards hardening vulnerable places and installations. It is important to keep quick response teams (QRTs) in readiness during this period."
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