The information on Badhwar Park, the landing site, was shared by ISI operatives with Pakistani-American Lashkar operative David Headley who had checked it out while conducting recce of the area, it says.

The book 'The Siege' by Adrian Levy and Cathy Scott-Clark claims that Headley was subjected to undergo a two-year course on surveillance and counter-intelligence by Pakistan's espionage agency Inter-Services Intelligence (ISI). His handler, Major Iqbal of ISI, gave him what he described as classified Indian files that he said had been obtained from within Indian police and army which revealed their training and limitations.