UAE President Sheikh Khalifa bin Zayed Al Nahyan mourned the death of his mother, Sheikha Hessa bint Mohammed bin Khalifa Al Nahyan, who passed away on Sunday, announced a statement by the Ministry of Presidential Affairs. The ministry declared three days of official mourning beginning on Sunday during which UAE flags will be flown at half mast. Custodian of the Two Holy Mosques King Salman bin Abdulaziz sent a cable of condolences to Sheikh Khalifa on death of his mother, reported the Saudi Press Agency (SPA). In the cable, he said: "I have been informed of the news of death of your mother Sheikha Hessa bint Mohammed Al Nahyan. I send to your Highness, your family and the people of United Arab Emirates utmost condolences and sincere consolation, praying to Allah Almighty to bestow mercy upon her soul.” Crown Prince Mohammed bin Salman bin Abdulaziz, Deputy Prime Minister and Minister of Defense, also sent a cable of condolences to the UAE president. He said: "I have been informed of the news of death of your mother, Sheikha Hessa bint Mohammed Al Nahyan. I send to Your Highness and your family utmost condolences and sincere consolation, praying to Allah Almighty to bestow mercy upon her soul.” Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, Sheikh Mohammed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, and various UAE leaders also offered their sincere condolences to the UAE president. Condolences flooded in from various country leaders, including Sultan of Oman Qaboos bin Said, King of Bahrain Hamad bin Isa Al Khalifa, Crown Prince of Bahrain Salman bin Hamad bin Isa Al Khalifa, Prime Minister of Bahrain Khalifa bin Salman Al Khalifa, and King Abdullah II of Jordan.