Four Crimean Tatars suspected of terrorism have pleaded not guilty at their trial in the Russian city of Rostov-on-Don.
The suspects rejected the charges of being members of the banned Hizb ut-Tahrir organization at the North Caucasus regional military court on June1.
The four men were detained in Crimea in January-April.
Four other Crimean Tatars were detained on May 12 on suspicion of being members of Hizb ut-Tahrir.
Russia has been heavily criticized by international rights groups and Western governments for its treatment of Crimea's indigenous Turkic-speaking people since Moscow annexed the peninsula in March 2014.
Arrests, disappearances, and killings of Crimean Tatars have been reported.
Crimea's Moscow-backed de facto authorities are currently looking for Crimean Tatar activist Ervin Ibragimov, who disappeared on May 24.