Another Qatari citizen, Kalifa Mohammed Turki Subayi, was sanctioned by the US Treasury on June 5, 2008, for his activities as a "Gulf-based al-Qaeda financier". Subayi's name was added to the UN Security Council's Sanctions List in 2008 on charges of providing financial and material support to al-Qaeda senior leadership. Subayi allegedly moved al-Qaeda recruits to South Asia-based training camps. He also financially supported Khalid Sheikh Mohammed, a Pakistani national and senior al-Qaeda officer who is believed to be the mastermind behind the September 11 attack according to the September 11 Commission report.