The United States has said that Hakkani terror network carried out recent attack on US Embassy in Kabul with the help of Pakistan's ISI. Chairman of the Joint Chiefs of Staff Admiral Mike Mullen said, Hakkani group is an arm of Pakistan's intelligence service. Appearing before the US Senate Armed Services Committee, Mullen said that Washington also have credible intelligence that Haqqani network was behind the June 28th attack against the Inter-Continental Hotel in Kabul. Mullen also said that in choosing to use violent extremism as an instrument of policy, Pakistan government especially the Pakistani Army and ISI, jeopardises not only the prospect of strategic partnership, but also Pakistan's opportunity to be a respected nation with legitimate regional influence. US Defence Secretary Leon Panetta also made it clear that United States will not allow safe havens for terrorists in Pakistan which are used to launch attacks on American forces. Panetta told the powerful Senate Armed Services Committee the first order of business right now is to put as much pressure on Pakistan.