Dubai: Human Rights Watch on Saturday asked Dubai's ruling sheikh to reveal the whereabouts of his daughter after a French ex-spy and others say she fled the emirate, only to be arrested off the coast of India.

A statement by the organisation marks the latest twist in the cloak-and-dagger drama surrounding the disappearance of Sheikha Latifa bint Mohammed Al Maktoum, who friends believe has been returned to Dubai after fleeing in late February. She was detained March 4 in a seaborne raid, witnesses said.

Sheikha Latifa's father is Sheikh Mohammed bin Rashid Al Maktoum, Dubai's ruler and the UAE's vice-president and Prime Minister.

"Failure to disclose the whereabouts and status of the princess could qualify as an enforced disappearance, given the evidence suggesting that she was last seen as UAE authorities were detaining her," Human Rights Watch said.

Dubai has declined to comment publicly about Sheikha Latifa. "UAE authorities should immediately reveal the whereabouts of Sheikha Latifa, confirm her status and allow her contact with the outside world," said Sarah Leah Whitson, Human Rights Watch's West Asia director.