Other senior international officials, however, maintain that senior Al Qaeda leaders such as Osama Bin Laden have been hidden by the ISI in major settled areas of Pakistan with the full knowledge of the Pakistani military leadership. A December 2011 analysis report by the Jamestown Foundation came to the conclusion that "in spite of denials by the Pakistani military, evidence is emerging that elements within the Pakistani military harbored Osama bin Laden with the knowledge of former army chief General Pervez Musharraf and possibly former Chief of Army Staff (COAS) General Ashfaq Pervez Kayani. Former Pakistani General Ziauddin Butt (a.k.a. General Ziauddin Khawaja) revealed at a conference on Pakistani–U.S. relations in October 2011 that according to his knowledge the then former Director-General of Intelligence Bureau of Pakistan (2004–2008), Brigadier Ijaz Shah (retd.), had kept Osama bin Laden in an Intelligence Bureau safe house in Abbottabad." Pakistani General Ziauddin Butt said Bin Laden had been hidden in Abbottabad by the ISI "with the full knowledge" of Pervez Musharraf but later denied making any such statement, saying his words were altered by the media, he said: "It is the hobby of the Western media to distort the facts for their own purposes." U.S. military officials have increasingly said, they do not notify Pakistani officials before conducting operations against the Afghan Taliban or Al Qaeda, because they fear Pakistani officials may tip them off.