UAE leaders paid their condolences to Queen Elizabeth II on the death of her husband, Prince Philip.
His death, at the age of 99, was announced by Buckingham Palace on Friday afternoon.
President Sheikh Khalifa sent a telegram to the UK monarch on Friday, state news agency Wam reported.
Similar messages of sympathy were sent by Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, and Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces.
Sheikh Mohammed bin Rashid also expressed his sympathies in a tweet describing the late Duke of Edinburgh as a close friend of the UAE.
"On behalf of people of UAE, I extend my sincere condolences to Queen Elizabeth II and the people of United Kingdom over the demise of Prince Philip, Duke of Edinburgh," the Vice President and Ruler of Dubai tweeted.
"A close friend to the UAE and other nations, he will always be remembered for his devotion to his country and people."
Sheikh Mohamed bin Zayed also tweeted his condolences.
Prince Philip, the Duke of Edinburgh, who has been a constant presence at the Queen's side, was in hospital for a month after being admitted as a precautionary measure on February 16.
He was discharged on March 16 after treatment for an infection and successful surgery for a pre-existing heart condition.
The UAE ambassador to the UK also paid tribute to the late Duke of Edinburgh.
"I would like to offer my deepest condolences to the Queen and the British Royal Family on the passing of Prince Philip, Duke of Edinburgh," Mansoor Abulhoul said on Twitter.
“He will be remembered as a good friend to the UAE and a positive influence on causes such as sustainability and environmental protection.”
Bahrain’s King Hamad bin Isa Al Khalifa offered his condolences to Queen Elizabeth over the passing of Prince Philip.
King Hamad praised Prince Philip’s service to Britain and its people, the Bahrain News Agency reported.
Philip, a Greek prince, married Elizabeth in 1947 and played a key role in modernising the British monarchy in the post-Second World War period.
They married five years before she became queen, and Philip is the longest-serving royal consort in British history.
Behind the walls of Buckingham Palace, he was the one key figure the queen could turn to and trust.
The couple had four children, eight grandchildren and 10 great-grandchildren.
"He has, quite simply, been my strength and stay all these years," Elizabeth said in a rare personal tribute to Philip, in a speech marking their 50th wedding anniversary in 1997.
Tributes to Prince Philip - in pictures
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The Honourable Artillery Company fires a gun salute at the Tower of London, with Tower Bridge in the background, to mark the death of Britain's Prince Philip, Duke of Edinburgh, at the age of 99. Getty Images -
The Death Gun Salute is fired by the 104th Regiment Royal Artillery to mark the death of Prince Philip, at Cardiff Castle in Wales. AFP -
Britain's Prince Edward and Sophie, Countess of Wessex arrive at Windsor Castle, England. AP Photo -
Members of the Household Cavalry ride past Buckingham Palace, London. Reuters -
Members of the King’s Troop Royal Horse Artillery arrive at the Parade Ground, Woolwich Barracks, London. AFP -
Members of the Honourable Artillery Company in advance of a gun salute to mark the death of Prince Philip, at the Tower of London. AFP -
A well-wisher waits in line to lay a floral tribute to Britain's Prince Philip, outside Buckingham Palace, London. AFP -
A cyclist rides past a digital display commemorating Prince Philip, in Glasgow, Scotland. Getty Images -
Rugby players observe a minute's silence in tribute to Prince Philip before the European Challenge Cup Quarter Final match between Bath Rugby and London Irish, in Bath, England. Reuters -
Copies of the 'Courier Mail' at a news stand in Brisbane, Australia, with news of Prince Philip's death. Getty Images -
Flags on Sydney Harbour Bridge fly at half-mast, in Sydney, Australia. Getty Images -
Flags at half-mast outside the Senedd, home of the Welsh Parliament, in Cardiff, Wales. Getty Images -
Members of media near a community gate at the home of Prince Harry, Duke of Sussex and Meghan Markle, Duchess of Sussex in Montecito, California, US, after the announcement of the death of Britain's Prince Philip. AP Photo -
Actor Sir Ian McKellen looks at floral tributes outside Windsor Castle, in Windsor, England. Getty Images -
The big screen inside the stadium displays a commemorative message on the death of Prince Philip, at Emirates Old Trafford cricket ground, in Manchester, England. Getty Images -
The British Columbia Legislature flies the Canadian flag at half-mast in Victoria, as piper Ken Wilson plays the 'Heights of Dargai'. AP Photo -
Floral tributes outside Buckingham Palace in London. Getty Images -
Floral tributes outside Windsor Castle. Getty Images -
A mourner draped in a British Union Jack flag takes pictures of flowers placed outside Windsor Castle. Reuters -
Miniature Schnauzer dog Lady Trixie of Linfield sits in front of tributes to Prince Philip at Hillsborough Castle, Northern Ireland, during the midday 41 gun salute. Getty Images -
Naomi Armstrong and her daughters Lily and Essie leave a bunch of flowers at the gates of Hillsborough Castle, Northern Ireland, in tribute to Prince Philip. Getty Images -
The Union Jack flag flies at half-mast at Buckingham Palace, London. Getty Images -
Members of The King's Troop Royal Horse Artillery fire a gun salute to mark the death of Prince Philip, at the Parade Ground, Woolwich Barracks, London. Reuters -
A member of the public person holds a floral tribute to Prince Philip outside Buckingham Palace, London. Reuters -
A girl lays flowers as tribute to Prince Philip outside Buckingham Palace, in London. Getty Images -
Soldiers from 206 Battery, 105 Royal Artillery, take part in a gun salute to the Duke of Edinburgh at Hillsborough Castle in Hillsborough, Northern Ireland. Getty Images -
Britain's Prince Charles addresses the media, outside Highgrove House in Gloucestershire, England, following the death of his father, Prince Philip. AP Photo -
A big screen displays an image commemorating Prince Philip, before the Premier League football match between Crystal Palace and Chelsea at Selhurst Park, London. Reuters
