"After the ban of the Mejlis, the occupiers extend persecution of the Crimean Tatars. We condemn the illegal actions of the Russian Federation," she wrote. "We will be proving in courts the illegality of the actions of the Russian Federation relating to the temporary occupation of Crimea and the violation of the rights of indigenous people of Crimea."

Earlier, lawyer Nikolai Polozov said via Twitter that on October 13, the so-called court of the annexed Crimea extended the detention of deputy chairman of the Mejlis of the Crimean Tatar people Ahtem Chiygoz, who has been charged with "organizing and participating in mass disorder outside the Crimean parliament February 26, 2014."

Read alsoMejlis ban: Chubarov says Russia to be sued in ECHRAs UNIAN reported earlier, April 26, 2016, the Russian-controlled "Supreme Court of Crimea" ruled the Mejlis of the Crimean Tatar people an extremist organization and banned its activities in the territory of the Russian Federation.

The Russian Justice Ministry also put the Mejlis on the list of extremist organizations.

On September 29, the Supreme Court of the Russian Federation upheld the ban of the Mejlis of the Crimean Tatar people in the temporarily occupied Crimea.