The son of the ruler of the city of Sharjah in the United Arab Emirates has died in London.
Sheikh Khalid bin Sultan Al Qasimi, a 39-year-old fashion designer, passed away on Monday, the Sharjah Media Office said.
The sheikh, who also went by the name Khalid Qasimi, was a founder of fashion label Qasimi.
There are to be three days of official mourning in Sharjah, where his father Sheikh Dr Sultan bin Muhammad Al Qasimi has ruled since 1972.
Flags have been ordered to fly at half mast.
A statement from the the UAE's Ministry of Presidential Affairs said: "President His Highness Sheikh Khalifa Bin Zayed Al Nahyan mourns with grief and sorrow, the death of Sheikh Khalid Bin Sultan Bin Mohammed Al Qasimi, the son of the Ruler of Sharjah, praying to Allah the Almighty to rest his soul in peace, and grant his family patience and solace."
Details of his repatriation and funeral prayers have not been announced. No further details are known about his death.
Messages of condolences to Al Qasimi's father and family have flooded in on social media.
Fashion photographer Mariano Vivanco posted a photo of him on Instagram alongside the caption: "Will always be my angel".
The British ambassador to the UAE, Patrick Moody, said the UK sent its "deepest condolences" to the sheikh's family.
According to the website for his fashion brand, Al Qasimi moved to the UK aged nine.
He studied at Central Saint Martins and his clothes were showcased worldwide.
