ISLAMABAD -Pakistan on Tuesday told the United States that it would not accept foreign troops on its territory in manhunt for Al-Qaeda and Taliban militants and would not give any blank cheque to Washington. Islamabad has flagged 'certain red lines that cannot be crossed by the US, said the Foreign Minister Shah Mahmood Qureshi addressing a news conference here with US Special Envoy Richard Holbrooke and top military commander Admiral Mike Mullen after their meeting at the Foreign Office. He said, The bottom line is the question of trust. We are partners and we want to be partners. We can only work together if we respect and trust each other. There is no other way. Nothing else will work. Qureshi said, Pakistan has made it clear that it would not accept any foreign boots on Pakistani soil and this has been accepted by Washington. He said Pakistan had differences with the United States on the issue of missile strikes by American drones in its tribal areas. Pakistan considers the attacks counter-productive and working to the advantage of extremists, he said. He said both sides had agreed to disagree on the drones issue, which would be discussed during a meeting of civil and military leaders of Pakistan, Afghanistan and the US to be held in Washington on May 5-7. Talking about recent statements by senior US officials on 'no blank cheque to Pakistan from America, he said, I respect 'no blank cheque policy but it should be for both sides. We have to understand, what we are saying and what others are saying. My country is under threat and we have to work together, he said. US Special Envoy Richard Holbrooke and Admiral Mike Mullen also called on Prime Minister Syed Yousuf Raza Gilani and also had meetings with Army Chief General Ashfaq Parvez Kayani and ISI Chief, General Shuja Pasha. At the news conference with Foreign Minister Qureshi, Holbrooke said extremism and terrorism were common threats and challenges for both Pakistan and the United States and there was a need to have joint, common and continued efforts to fight them. He said, US wants to have continued engagement with Pakistan to deal with the menace of extremism and terrorism. He said that under the new and continued engagements between the two countries, there would be more cooperation in the war against terrorism. Holbrooke said US was also helping Pakistan and encouraging the members of Friends of Democratic Pakistan to provide maximum help. United States will make a substantial pledge to Pakistan at a donor meeting in Tokyo this month, to help the nation fight terrorism and boost its economy, he said adding, We hope other countries will do the same. Admiral Mullen said there had been close civil and military cooperation between the two countries. He said, Its a long-term commitment, adding We generate trust. Mullen said, The region has vital interest for us. He said there had been continued and constructive engagements between the two countries at all levels. He said the main purpose of the meetings and engagements between the two countries was to share the lessons learnt in the war against terrorism. In his opening statement earlier, the Foreign Minister said the meeting with the top US officials was very frank, candid and they discussed all the aspects including new policy announced by President Obama recently. Qureshi said they also had preliminary discussion on the implementation stage of the new policy of Obama administration for Pakistan and Afghanistan and agreed to meet next month in Washington for second round of trilateral talks. He said Pakistan also appreciated the recent statement of President Obama that America was not fighting war against Islam and it had great respect for the Muslims. Its a positive statement, he said. According to sources, Army Chief General Ashfaq Parvez Kayani, in his meeting with the visiting US officials rejected a US proposal for joint operations in the countrys tribal areas. The sources said that that General Kayani had rather emphasized the need for more confidence building measures between the two countries to tackle the issue of terrorism. According to the sources, regional security situation, new US policy for Afghanistan and Pakistan (AfPak) and other issues of mutual interest also came under discussion during the meeting. The COAS also called for strengthening the Tripartite Commission to make it an effective forum for dealing with the issue of militancy and terrorism, the sources added. The sources further said that General Kayani also took serious exception to the US administration and media criticism of ISI and said that ISI was a national security agency engaged in protecting and promoting the national interests. He is believed to have categorically rejected allegations levelled against ISI by the US Defence Secretary Robert Gates that ISI had contacts with Afghan groups militants like Gulbadin Hekmatyar, Jalaluddin Haqani and Nazir. General Kayani also shared Pakistans security concerns over the growing Indian involvement in Afghanistan and its efforts to destabilise Pakistan. Earlier in the day, the US officials held separate meetings with President Asif Ali Zardari, Prime Minister Syed Yousuf Raza Gilani, Foreign Minister Shah Mahmood Qureshi and PML-N Quaid Nawaz Sharif. Earlier in the day, US Special Envoy to Afghanistan and Pakistan Richard Holbrooke in a question-answer session with a number of media persons said that top leaders of Taliban and Al-Qaeda were in Balochistan and they shifted their locations, moving from Quetta to Karachi and tribal areas. Taliban Shoora is operating in Quetta, and Baitullah Mehsud and Fazalullah while sitting in Pakistan, are lending their help to Taliban in Afghanistan, he said. Holbrooke said that as 9/11 had unified the American nation so the incidents of Swat and Lahore had brought Pakistani leaders to the unanimous conclusion that Al-Qaeda and Taliban were a common threat for two countries. The US Special Envoy said that there was no second opinion among Pakistani politicians that Al-Qaeda and Taliban were common enemies of US and Pakistan. There has been a lot of public opinion shift in the last one year among Pakistanis about Taliban militants, Holbrooke told the journalists. On a question regarding Pakistans threat perception of India and its involvement in war against terror, Holbrooke said, Yes, it has been an issue and the terrorists who had attacked Mumbai wanted to derail peace between the two countries to divert Pakistans concentration in war on terror, he said and continued to say, We are not negotiating between India and Pakistan as it is not our job. Our job is to negotiate between Afghanistan and Pakistan. He said that India and Pakistan would have to resolve their problems on their own. Admiral Mike Mullen, Chairman Joint Chiefs of Staff, who accompanied Holbrooke in the question-answer session, while responding to a query said that US authorities had exhibited their concerns on ISI due to its historical connections with some of the Mujahidin groups. We have never raised fingers on ISI role nor have exerted any pressure on this count, Mullen said adding, We have been assured by the ISI chief and other military authorities that they are committed in the war on terror. On the same question of growing US criticism on ISI, Richard Holbrooke said that the US had never criticized ISI role. We are striving for better relationship between the intelligence agencies of both US and Pakistan, Holbrooke added. Richard Holbrooke further said that around more than half Taliban were part-time fighters and 'not ideologically driven. Leaders of Taliban reside in Pakistan while its fighters live in Afghanistan, he observed. He said that a majority of fighting militants were not hardcore Taliban and had joined the movement just following their gun culture. Responding to another query, Mullen said that he was aware of Kayanis position who was engaged on both eastern and western borders. After Mumbai carnage, the situation on Pakistans eastern borders turned tense, and it was the plan of terrorists to again open eastern border for Pak Army to divert its attention from the war on terror on western borders, he added. Mullen told journalists that he had exchanged views with General Kayani on different matters. Pakistan Army was focusing on western borders prior to Mumbai incident but it had to shift its focus to eastern borders too after Mumbai attacks, he stated. Richard Holbrooke observed that a greater cooperation and intelligence sharing was needed between Pak ISI and NATO forces as well as Afghan spy agencies to combat scourge of terrorism efficiently. He said that it was the reason that US was developing joint structures at the borders. The Chairman Joint Chiefs of Staff, Mike Mullen said that the US was intending for major economic uplift of restive region to change peoples attitudes. There would be economic growth if we provided secure environment to the people. We have to instil positive thinking into youths otherwise the negative thinking will give rise to instability, he cautioned. Mullen categorically said that hardcore militants had to be killed or captured.