riyadh bribery embezzlement money launder abuse power among accusations level dozens saudi princes officials businessmen detain anti-corruption probe saudi official tell reuters monday eleven princes four minister tens former minister detain late saturday king salman decree creation anti-corruption committee chair crown prince mohammed bin salman 32-year-old son amass expansive power past two years new body give broad power investigate case issue arrest warrant travel restrictions seize assets official say billionaire prince alwaleed bin talal nephew king owner investment firm kingdom hold face allegations money launder bribery extort officials prince miteb bin abdullah remove head powerful national guard accuse embezzlement hire ghost employees award contract company include 10 billion deal walkie-talkies bulletproof military gear worth billions saudi royals former riyadh governor prince turki bin abdullah accuse corruption riyadh metro project take advantage influence award contract company official say former finance minister ibrahim al-assaf board member national oil giant saudi aramco accuse embezzlement relate expansion mecca grand mosque take advantage position inside information benefit land deal official add accusations could independently verify saudi princes accuse bribery embezzlement money launder official