Sheikh Ahmad Bin Juma Al Maktoum passed away today, according to the UAE's official news agency WAM.
The palace of Sheikh Mohammed Bin Rashid Al Maktoum, Vice-President and Prime Minister of the UAE and Ruler of Dubai, was in mourning followng the death, it said.
Local radio stations are playing the Quranic verses as a sign of mourning.
The body of the deceased will be prayed upon in Nad Sheba mosque after Asr prayers on Monday.
The burial will take place in Bur Dubai's Um Hurair cemetery.