The United Nations on Friday said that it was “very concerned” for Dubai’s Sheikha Latifa, two months after having asked the United Arab Emirates for proof of life.

In February, the United Nations Human Rights Office asked for evidence about the daughter of Dubai’s ruler Sheikh Mohammed bin Rashid Al-Maktoum, after the BBC broadcast a video shot by Latifa saying she was being held captive and feared for her life.

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Sheikh Mohammed is the vice president and prime minister of the United Arab Emirates (UAE). His 35-year-old daughter has not been seen in public since a foiled attempt to escape from the Emirate in March 2018.

UN High Commissioner for Human Rights office spoke to the UAE’s diplomatic mission in Geneva in a bid for evidence that she was still alive.

“We asked her family to give us proof of life and so far we haven’t received any,” spokeswoman Marta Hurtado told reporters in Geneva. “We would like… clear, compelling evidence that she is alive.” She also added that the office was now assessing “a number of possible options”.

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It has been trying to set up a meeting between senior human rights officials and UAE’s new ambassador in Geneva and while the mission has accepted the request in principle, no date has yet been fixed.

“Ideally, of course, we would like to meet her, to talk to her freely, alone, and to examine all the aspects of her situation,” said Hurtado.

If the meeting with the ambassador takes place, the rights office also wishes to raise the case of Latifa’s older sister Sheikha Shamsa and ask about her whereabouts. Shamsa disappeared from the British city of Cambridge in 2000.