WASHINGTION - For the second day running, Bush administration official have neither confirmed nor denied that President George W. Bush secretly  approved orders in July allowing U.S. military raids inside Pakistan against alleged terrorist targets without Islamabad's prior approval. But Pakistan's Ambassador to the United States Hussain Haqqani says that he has been assured at the "highest level by the US government" that the reported orders do not actually exist. On Friday, Tony Fratto, a White House spokesman, was pointedly asked  under what authority has President Bush ordered cross-border operations in Pakistan. The spokesman replied, " I'm aware of the reports that you're talking about. It's not a story that I'm going to comment on. And I'm not going to comment on rules of engagement with the enemy..." Pressed again on the issue, Fratto repeated what he had said. "I don't have anything for you on that story," which was first reported by The New York Times. In an interview with CNN, Ambassador Haqqani once again categorically ruled out permitting any foreign troops on the Pakistani soil. "We will not allow foreign troops on Pakistani soil under any condition," he stressed, speaking in the backdrop of reports claiming US authorisation for ground incursions by Afghanistan-based American troops facing a growing Taliban insurgency. The ambassador told CNN said he has been "assured at the highest level by the US government that no such orders exist." Haqqani said Pakistan itself would handle security within its borders. "We have been assured that the United States ... fully understands that the most effective means of fighting terrorism would be to allow Pakistani military forces to operate on the Pakistani side, while letting international forces and Afghan forces operate on the Afghan side," he said. The envoy said unauthorised US operations inside Pakistan would only harm relations between the two countries and added that the September 3 incursion, which claimed innocent lives, was counterproductive. "The kind of operation that we saw on the third of September is certainly not acceptable to the Pakistani people or the Pakistani government, and it does not advance the cause of the war against terror. It enrages the people of Pakistan," he said.