Interpol is searching for Mustafa Ahmed Muhammad Uthman Abu Al-Yazid, Al Qaeda's chief financial officer and senior adviser to Osama Bin Laden and has alleged that he is hiding in areas adjoining the Afghanistan-Pakistan border, sources told Daily Times on Friday. In a letter to Pakistani law enforcement agencies including the Federal Investigation Agency, Interpol stated that Mustafa was an Egyptian and was reportedly a close aide of Bin Laden, sources added.Mustafa had many aliases including Shaykh Said Al-Misri, Mustafa Abu Yazid, Saad Abu Shayama, Mustafa Muhammad Ahmed and Said Uthman, they said. Interpol had gathered these facts by interrogating a suspect arrested by law enforcement agencies, sources said, adding that the letter did not mention his name. The suspect alleged during interrogation that Mustafa was currently in Pakistan's tribal areas. Interpol wrote that Mustafa was born in Egypt on December 27, 1955, took over Al Qaeda's finances and became Bin Laden's senior adviser, sources said, adding that he had also been a member of the Egyptian Islamic Jihad and was in contact with activists of the Islamic Movement of Uzbekistan.