The UN says the United Arab Emirates has failed to provide compelling proof that Sheikha Latifa bint Mohammed al-Maktoum – the missing daughter of Dubai’s ruler, last seen in late 2018 – is still alive.

The UAE last month said Princess Latifa was being cared for at home by family and medical professionals.

The UN’s human rights office has repeatedly asked Dubai to provide “proof of life” for Latifa, a demand echoed by the UK foreign secretary, Dominic Raab, and other western governments.

On Friday, the UN spokesperson Marta Hurtado told a briefing in Geneva that the UAE had not responded to its request or clarified the conditions in which Latifa was apparently being held.

“We haven’t got any proof of life, and we would like one, one that is clear compelling evidence that she is alive. Our first concern of course is to be sure of that, that she is still alive,” Hurtado said.

Senior UN officials had sought a meeting with the UAE ambassador in Geneva about Latifa, which in principle had been agreed, Hurtado said. She added that the UN also planned to raise the case of Latifa’s older sister Shamsa, who was kidnapped in 2000 from the streets of Cambridge.

Concerns over the fate of Latifa, 35, have grown after videos emerged in which she claimed her villa home had been “converted into a jail”.