He left Afghanistan after the September 11 attacks and prior to the United States invasion of Afghanistan . He fled to Iran , where he was arrested in Sistan and Baluchestan Province in April 2003 . Also arrested alongside him were other senior al-Qaeda leaders including Saif al-Adel , Abu Mohammed al-Masri and Sulayman Abu Ghayth . According to a statement that Sulayman Abu Ghayth gave to the Federal Bureau of Investigation four al-Qaeda leaders were first jailed in a United States intelligence building in New York for approximately one year and eight months
September 11 attacks
September 11 attacks
Abu Khayr al-Masri