NEW YORK - Following up on her stiff warning to Pakistan, US Secretary of State Hillary Clinton has said that there are people in the Pakistani government who know the whereabouts of Al-Qaeda leader Osama bin Laden and Afghan Taliban chief Mullah Omar. Im not saying that theyre at the highest levels but I believe that somewhere in this government are people who know where Osama bin Laden and Al-Qaeda is, where Mullah Omar and the leadership of the Afghan Taliban is and we expect more cooperation to help us bring to justice, capture or kill, those who attacked us on 9/11, she told CBS programme 60 Minutes, which was broadcast in full on Sunday night. Some Pakistani officials were more informed about the Al-Qaeda and the Taliban than they let on, Clinton added. Political observers here were stunned by her statement about Pakistanis knowing the whereabouts of Osama and Mullah Omar even though she was not asked a specific question about the Al-Qaeda and Taliban leaders. In an excerpt of Clintons interview released on Friday night, she warned Pakistan that it would face very severe consequences if any terror plot like the failed Times Square bombing was traced to that country. Weve made it very clear that if, heaven forbid, an attack like this that we can trace back to Pakistan was to have been successful, there would be very severe consequences, she had said. Experts believe Clintons threat means that the US could slow millions of dollars in economic and military aid, rather than mount directly military action in the tribal belt, although some American politicians have raised voices in favour of that, too. In fact, the US is already engaged in its most ferocious campaign on Pakistan soil for decades through the CIA drone strikes, which are currently averaging about two per week. A senior Pakistani intelligence official said there had been 40 drone attacks so far this year, compared with 49 in the whole of 2009. Other tallies have counted just over 30 strikes in 2010. The CIA has received permission to strike a much wider range of suspected militants than before, including those whose identities have not been established, the Los Angeles Times reported last week. Previously, the CIA could only attack individuals on a vetted list of Taliban and Al-Qaeda leaders. When asked why Obama administration was not piling up pressure on Islamabad to hand over Osama bin Laden and his deputy Ayman al Zawahiri, Hillary replied, I have to stand up for the efforts the Pakistani government is taking. They have done a very significant move toward going after the terrorists within their own country. Her comments come as other senior US officials including Attorney General Eric Holder said they had obtained new evidence that Pakistani Taliban were behind the attempt to trigger a car bomb blast in the heart of New York. We know they facilitated the bomb plot and they probably also financed it, the Attorney General told ABC News. Faisal Shahzad, a 30-year-old naturalised American citizen of Pakistani origin, was arrested last Monday for rigging a SUV vehicle to explode in the Times Square. In the wake of the incident, Washington has stepped up pressure on Pakistan to crack down on militants safe havens in North Waziristan. The New York Times said the US military commander in Afghanistan, Gen Stanley A McChrystal, met Pak Army chief Gen Ashfaq Parvez Kayani in Islamabad on Sunday and pressed for a new military offensive in North Waziristan, the main base of the Pakistani Taliban. Asked what message she had for Pakistan following the Times Square bombing, Clinton said, That this is a threat we share...we have a common enemy...there is no time to waste...go as fast and hard as we can. She then added, We cannot tolerate having people encouraged, directed, trained and sent from Pakistan to attack us. When pressed by 60 Minutes anchor Scott Pelly if Pakistan was the source of terrorism why the US was not leaning more on the country, Clinton reeled back a bit saying she had to stand up to the current dispensation in Islamabad because there was a sea change in its commitment and they had done a very significant move towards going after terrorists in their own country. Accusing Pakistan of having played a double game in previous years, the US foreign secretary warned, Weve made it very clear that if, heaven forbid, that an attack like this that we can trace back to Pakistan were to have been successful, there would be very severe consequences. Pelley: What do you mean exactly? Clinton: I think I will let that speak for itself Pelley: Developments to come? Clinton: Right