The UN has called for the United Arab Emirates to provide "concrete" proof that Princess Latifa Al Maktoum, the daughter of Dubai's ruler reportedly being held in detention, is alive.
In a statement issued in Geneva on Tuesday, UN human rights experts also said she should be released "urgently".
Princess Latifa tried to flee Dubai in 2018. In footage shared with BBC Panorama, she says commandos drugged her and flew her back to detention.
The UN says it needs more information.
Dubai's royal family has previously said Princess Latifa is safe and being "cared for at home".
On 5 March, the UN said it was still awaiting further details from the UAE - two weeks after an initial request for proof of life.