Russia has raised concerns over the arrival of a U.S. cruiser equipped with a ballistic missile-defense system in the Black Sea.
The Russian Foreign Ministry released a statement protesting the move, saying it was being viewed as "a threat to our security."
The "Monterey" cruiser was sent to the area for naval exercises with Ukraine.
Russia has repeatedly voiced disapproval over proposed U.S. plans to establish a missle-defense system based in Eastern Europe.
compiled from local and international news agencies