Troops in unmarked uniforms stand guard in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. The Kremlin hasn't responded to the accusations, but Russian lawmakers urged President Putin to act to protect Russians in Crimea. (AP Photo/Andrew Lubimov)

Troops in unmarked uniforms stand guard as they take control the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. (AP Photo/Andrew Lubimov)

Troops in unmarked uniforms stand guard as they taking control the the Caost Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. The Kremlin hasn't responded to the accusations, but Russian lawmakers urged Putin to act to protect Russians in Crimea. (AP Photo/Andrew Lubimov)

Troops in unmarked uniforms stand guard as they take control the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. (AP Photo/Andrew Lubimov)

A gunman in unmarked uniform stands guard as troops take control the the Coast Guard offices in Balaklava on the outskirts of Sevastopol, Ukraine, Saturday, March 1, 2014. An emblem on one of the vehicles and their number plates identify them as belonging to the Russian military. Ukrainian officials have accused Russia of sending new troops into Crimea, a strategic Russia-speaking region that hosts a major Russian navy base. (AP Photo/Andrew Lubimov)