The BBC reports:
A son of the ruler of Sharjah in the United Arab Emirates has died in London, officials have announced.
Sheikh Khalid bin Sultan Al Qasimi died on Monday. London police say his death is being treated as unexplained.
The 39-year-old had forged a career for himself as a fashion designer. Clothes from his label, Qasimi, were shown at London Fashion Week.
Funeral prayers were held on Wednesday morning in the UAE, where three days of national mourning have been declared.
His father, Sheikh Sultan bin Muhammad Al Qasimi, has ruled Sharjah since 1972.He expressed his sorrow in an Instagram post, saying his son was "in the care of God".
In a statement, the fashion label Qasimi said Sheikh Khalid had died "unexpectedly" but did not provide further information on his death.
London's Metropolitan Police said they had received a report of "a sudden death at a residential property in Knightsbridge".
A post-mortem examination was carried out on Tuesday but proved inconclusive, and they were awaiting the result of further tests, the police statement added.