Russia's Black Sea fleet is on the move in Ukraine.
Soldiers are protecting Russian properties in Crimea, where the fleet is based.
Fleet officials also fear reprisals against the 60,000 Russian-speaking Ukrainians and Russian nationals living in Sevastopol, Ukraine.
Some residents there are signing up for self-defense groups.
The fear of reprisals stems from the geopolitical nature of the country.
People in the Russian-speaking east tend to sympathize with Moscow, which supported the recently ousted president Viktor Yanukovich.
The Ukrainian-speaking west favors greater independence from Russia.
Ukraine's parliament has already raised concerns about "signs of separatism."
A national security council meeting was held Tuesday to address the concerns.
