Oman's <a href="https://www.thenationalnews.com/uae/2022/02/18/sheikh-khalifa-receives-letter-of-thanks-from-sultan-of-oman/" target="_blank">Sultan Haitham </a>has ordered three days of official mourning and for flags to be flown at half-staff to mark the death of the UAE's President, <a href="https://www.thenationalnews.com/uae/2022/05/13/president-sheikh-khalifa-dies-age-73/" target="_blank">Sheikh Khalifa</a>. The UAE's Ministry of Presidential Affairs announced Sheikh Khalifa's death on Friday. He was 73. Oman's period of mourning will last until Sunday. The Diwan of Oman's Royal Court issued a statement of condolence. The court said Sheikh Khalifa was among the leaders who “worked to serve [his] Arab and Islamic nation, and led the sisterly United Arab Emirates with determination and perseverance until it became a landmark referred to in all fields”. Oman News Agency said Sultan Haitham had sent two cables to <a href="https://www.thenationalnews.com/tags/sheikh-mohammed-bin-rashid/">Sheikh Mohammed bin Rashid</a>, Vice President and Ruler of <a href="https://www.thenationalnews.com/tags/dubai/">Dubai</a>, and to <a href="https://www.thenationalnews.com/tags/sheikh-mohamed-bin-zayed/">Sheikh Mohamed bin Zayed</a>, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, expressing “sincere condolences and sincere sympathy”.