Pakistan would face unspecified "severe consequences" if locally based militants succeeded in attacking the United States in future, Secretary of State Hillary Clinton warned said in remarks made public on Saturday. In administering the stern warning, which came days after a Pakistani-American was charged with attempting to set off a bomb in New Yorks Times Square, the top American diplomat also asked Pakistan to "do more" in the war on terror even though she acknowledged that Islamabad had lately increased its cooperation with the U.S. "We've made it very clear that if, heaven-forbid, an attack like this that we can trace back to Pakistan were to have been successful, there would be very severe consequences," the top U.S. diplomat said in an interview with CBS' "60 Minutes" news programme. Observers here were surprised by Clinton's grim warning despite the fact that the White House, the Pentagon and her own State Department have been expressing satisfaction over the cooperation being extended by Pakistan, especially in investigating Shahzad's case. The spokesmen of these major branches of US government have also been rebuffing Indian journalists attempts to portray Pakistan in bad light, defending Islamabad's performance in combating terrorists. The United States is probing whether Faisal Shahzad, the would-be bomber, had connections to foreign militant groups that either funded or helped in the botched bombing attempt last Saturday. He has reportedly told U.S. investigators that he was outraged by the relentless U.S. drone attacks that have killed a number of Pakistani people, including women and children. Mrs. Clinton said in the interview, which will be telecast in full on Sunday, that Pakistan's attitude toward fighting terrorists has changed remarkably. "We've gotten more cooperation and it's been a real sea change in the commitment we've seen from the Pakistan Government. [But] We want more. We expect more," she said. Since the relationship with Pakistan turned around, the results are encouraging, she said. "We also have a much better relationship, military to military, intelligence to intelligence, government to government than we had before," Mrs. Clinton told CBS. "I think that there was a double game going on in the previous years, where we got a lot of lip service but very little produced. We've got a lot produced. We have seen the killing or capturing of a great number of the leadership of significant terrorist groups and we're going continue that." Defence Secretary Robert Gates said on Friday the United States was prepared to provide more assistance to Pakistan if it wanted it in the wake of the attempted Times Square bombing. "The Pakistanis have been doing so much more than 18 months or two years ago any of us would have expected," Gates told reporters at Fort Leavenworth, Kansas. He referred to Pakistani Army offensives, dating to spring 2009, against Taliban extremists in areas near the Afghan border, including in south Waziristan. Gates said the Obama administration is sticking to its policy of offering to do as much training and other military activity inside Pakistan as the Pakistani government is willing to accept. "It's their country," Gates said. "They remain in the driver's seat, and they have their foot on the accelerator." The topic arose later during a question-and-answer session with Army officers at the Command and General Staff College at Fort Leavenworth. One officer asked Gates about anti-American sentiment among the religious elite in Pakistan. Gates said extends more broadly to Pakistanis who recall that the U.S. abandoned Afghanistan after the Soviets were driven out in 1989, as well as the U.S. sanctions against Pakistan in the early 1990s. "If you look at it from the Pakistanis' standpoint, there is some justification for their concerns," Gates said. "Their view is that in several successive instances the United States has turned its back on Pakistan. And the biggest question they have is, Once you are done in Afghanistan, are you going home again? Or will we have a long-term relationship?'" Gates said the U.S. intends to have a long-term relationship with both Afghanistan and Pakistan, but the history of the U.S. role in the region is being exploited by the extremists to raise doubts about the Obama administration's strategic goals and intentions. "I have to say, regardless of the anti-American sentiment on the part of many Pakistan elite, what the Pakistani army has done in the Northwest Frontier area and south Waziristan ... has been tremendously helpful to us," he said. "They are moving in a direction and they are taking action in places that I will tell you that 18 months or two years ago I would have thought impossible. And they are doing it because it is in their own interest."