The EU said Tuesday, November 21, that Dmitry Vladimirovich Ovsyannikov was added to a list of those accused of "actions undermining or threatening the territorial integrity, sovereignty and independence of Ukraine," CNBC said.

Read alsoKlimkin: New sanctions against Russia should be discussedOvsyannikov was appointed governor of Sevastopol, home to Russia's Black Sea fleet, by Russian President Vladimir Putin in 2016.

The EU says "he has worked for further integration of the illegally annexed Crimean Peninsula into the Russian Federation."

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It says that 150 people and 38 "entities" — often companies or organizations — are now subject to these EU sanctions, which will remain in place until at least March 15.