Riyadh, Jan 24 (ANI): UAE President Sheikh Khalifa bin Zayed Al Nahyan announced three days of mourning after the passing of King Abdullah bin Abdulaziz of Saudi Arabia. He said the mourning would start on Friday and ordered the UAE national flag to be flown at half-mast at all government departments in the UAE and at all embassies and diplomatic missions of the UAE overseas. Earlier, King Abdullah was carried in a simple white shroud to an unmarked grave on Friday, in keeping with local religious traditions. Wahhabi Sunni Islam, the form of religion practiced by the Saudi state, considers ostentatious displays of grief or mourning to be sinful and akin to idolatry. Before his burial, Abdullah's body was transported in a city ambulance to a mosque, where Muslim leaders, Saudi Princes, powerful clerics and billionaire Arab businessmen gathered for prayers.