Spokesperson of the U.S. Department of State Heather Nauert reported this on Twitter.
"The United States stands with Oleh Sentsov and calls on Russia to release all Ukrainian political prisoners immediately," she wrote.
As reported, 64 Ukrainian political prisoners are held in Russia and in the annexed Crimea.
Ukrainian filmmaker Oleg Sentsov was detained by Russian security services in Crimea in May 2014.
On August 25, 2015, the North-Caucasian Military Court in Russia's Rostov-on-Don sentenced Oleg Sentsov to 20 years in a penal colony for alleged "plotting acts of terrorism." Another convict in the case, Oleksandr Kolchenko, was sentenced to 10 years in prison.
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