The United States gave heads-up to India, besides Afghanistan and Pakistan, on the leak of classified documents pertaining to the war against terrorism. The documents released by Wikileaks website, further strengthens what top Indian officials have been saying for quite some time now that ISI has links with al-Qaeda, Taliban and other extremist organizations. US State Department spokesman P J Crowley told reporters at his daily news briefing in Washington that both the White House and the State Department acknowledged that they are concerned about the links between ISI and the extremist elements. He said, from the standpoint of India, it clearly wants to see that Pakistan is taking steps to bring to justice those people that threaten neighbouring states. In reply to a question, Crowley said, if Pakistan wants to convince India that it has made this kind of fundamental change, bringing to justice those who are responsible for the Mumbai attack would be a very constructive and important step. The spokesman said the US continues to have conversations with Pakistan on bringing to justice those responsible for the Mumbai attack.