Crimean Tatar activist Ervin Ibragimov has gone missing, his colleagues says.
Nariman Celal, deputy chairman of the Crimean Tatars' self-governing body, the Mejlis, told RFE/RL on May 25 that Ibragimov disappeared overnight.
Ibragimov’s relatives have not been able to locate him.
Crimea’s Russia-controlled authorities have not given any official statements regarding the activist’s fate.
Ibragimov is a former Bakhchisarai city council deputy and a member of the executive committee of the World's Congress of the Crimean Tatars.
Several Crimean Tatars went missing after Russia forcibly annexed the Ukrainian peninsula in March 2014. Some of them were later found dead.
The majority of the Crimean Tatars, the peninsula's indigenous Turkic speaking people, have openly protested the annexation.