Controversial Qatari sheikh, supposedly a contender for crown, says he has been detained in UAE

A controversial member of Qatar’s royal family says he is being detained in the UAE, media reported Sunday, sparking a quick denial by Emirati officials.
Sheikh Abdullah bin Ali Al-Thani, a previously little-known royal, emerged as a key figure in the dispute between the Gulf states in the weeks after Riyadh and Abu Dhabi cut ties with Doha in June.
He is seen by some as a potential challenger to the Qatari leadership.
A video circulating online, also broadcast by Qatar-based Al-Jazeera television, shows the sheikh warning that he was “afraid something could happen to me that will be blamed on Qatar”.
“I am now in Abu Dhabi, where I was a guest of (UAE crown prince) Sheikh Mohammed” bin Zayed al-Nahyan, said Sheikh Abdullah.
“That is no longer the case. I am now detained.”