LAHORE - Five US Senators have urged their President an immediate response to the crisis in the NWFP and to provide assistance to the Internally Displaced Persons(IDPs) in Pakistan in order to ensure that it does not lead to greater unrest throughout the rest of the country. In a letter to Barack Obama, US Senators Russell D. Feingold, Joseph I. Lieberman, Lindsey Graham, Jon Kyl and Robert P. Casey Jr. have observed that if the crisis were not adequately addressed, these would undermine the Pakistan govt and compromise the US ability to stabilise the country. They have also shown their concerns about the designated terrorist organisations providing help to the IDPs 'in the absence of a sufficient govt response. Terming it a moral and strategic imperative, they have asked Obama administration to address the short-term and long-term needs of the displaced people. Following is text of the letter: "Dear Mr President: As you know, the humanitarian crisis in Pakistans North West Frontier Province, which is the result of increased fighting between the Pakistan Army and militants, is reaching historic and catastrophic proportions. Over one million people have already been displaced, in what is believed to be the single largest civilian migration in the region since the 1947 Partition. Worryingly, the numbers of displaced are continuing to grow. We must help the Pakistani govt protect the civilian population while fighting continues and provide assistance to the displaced to ensure this crisis does not lead to greater unrest throughout the rest of the country. United Nations officials have called for a 'massive international effort to address the crisis, warning that absent such an effort, it will be 'absolutely impossible to provide assistance. Reports indicate that there are significant gaps in the basic assistance currently being provided, including food, water, shelter, and sanitation. In addition, some 80 to 90 per cent of those displaced are relying on the hospitality of family and friends already under strain from the global economic crisis. We are deeply concerned that if not adequately addressed, the crisis could undermine the Pakistani govt and compromise our ability to help stabilise the country. We note with concern that the media is reporting the charity wings of designated terrorist organisations such as Lashkar-e-Taiba are already rushing to provide assistance in the absence of a sufficient govt response. For this reason, we are writing to urge you to work in full partnership with the Government of Pakistan to mount an immediate US response that addresses both the short-term and long-term needs of the displaced. We believe that nothing less than an immediate, large-scale response that mobilizes the resources of the entire US govt, as well as the private sector, is required to ensure the Pakistani people receive the help they need. As we saw in the aftermath of the 2004 tsunami in Southeast Asia and the 2005 earthquake in northern Pakistan, the US possesses unique capabilities to provide swift and effective aid for civilian populations suffering from unprecedented humanitarian crises. We believe that we have both a moral and strategic imperative to help provide an immediate response to the crisis in Pakistan. We thank you for your attention to this urgent and critical matter. Sincerely, Russell D. Feingold, Joseph I. Lieberman, Lindsey Graham, Jon Kyl, Robert P. Casey Jr.