ISLAMABAD US Ambassador to Pakistan Cameron Munter on Tuesday called on President Asif Ali Zardari at Aiwan-e-Sadr and discussed host of issues including the situation arising out from the recent Nato attack on Pakistani border posts in Mohmand. The sources said that the US ambassador regretted the loss of life of Pakistani servicemen and apprised the President of the US decision to investigate the incident in close cooperation with Pakistan. Munter, according to the sources, emphasized the need for defusing the situation in the interest and stability of Afghanistan and the region. However, the President, the sources said, has made it clear to the US that Pakistan would not cooperate until and unless a strict action was taken against the ISAF commander in Afghanistan who had ordered his forces to attack the Pakistani posts. According to the sources, the US ambassador brought the important message of US government but Mr Zardari told the US envoy that the decision to get vacated the Shamsi airbase would not be taken back. This decision has been taken with mutual understanding and it would not be taken back, Mr Zardari said. The sources said President Zardari while condemning the incident said that this was not the first time that the NATO/ISAF forces have breached Pakistans territorial sovereignty but they have been doing so in the past. The President said that the Nato attack has seriously harmed efforts for fighting terrorism. APP adds: President Asif Ali Zardari has warned against machinations of anti-democratic forces and called upon PPP workers to stand firm against such designs. In a message on the 45th Founding Day of the Pakistan Peoples Party (PPP) falling on November 30, the president said the day celebrations this year were taking place at a time when the party, its leaders and government is subjected to a vicious campaign to tarnish its image by the remnants of dictatorship even as it has been elected by the people. We will foil all conspiracies against the party and continue our work for strengthening democratic institutions as envisioned by Benazir Bhutto and for which she rendered sacrifice, he said, adding, Bhuttoism lives and will live on to empower the people and strengthen democracy and democratic institutions. The PPP co-chairman said the government removed the vestiges of dictatorship from the unanimous Constitution of 1973, opened the doors of political reforms for the first time, lent a new strength to democracy through political reconciliation and launched a massive poverty alleviation programme, Benazir Income Support Programme (BISP). These are some of the great victories of the people of Pakistan and especially of the PPP workers, he said. Paying tributes to the party workers, the president said: The courageous and devoted workers of PPP are the strength of the party and the nation. It is because of them that dictatorship has not been able to take roots in Pakistan. It never will. The struggle for safeguarding democracy and democratic institutions and empowering people will continue no matter what our detractors say or do, he added.