A member of the royal family of Abu Dhabi who was captured on videotape torturing an Afghan grain dealer has reportedly been detained, a senior U.S. State Department official told CNN Saturday. The official said the government of the United Arab Emirates, which includes Abu Dhabi as one of its seven emirates, told the State Department that Sheikh Issa bin Zayed al Nahyan is under house arrest pending an investigation, but that the United States has not independently confirmed the development.