Russia has deployed S-300VM in Syria

Fox News, citing U.S. officials, is saying that Russia has deployed it S-300VM air defense missile system to Syria.

MAKS Airshow 2013 (Ramenskoye Airport, Russia) (521-17)
By Vitaly V. Kuzmin (http://vitalykuzmin.net/?q=node/521) [CC BY-SA 4.0 or CC BY-SA 4.0], via Wikimedia Commons

Two officials were quoted as saying that the system’s components were seen arriving at the Russian naval facility in Tartus over the weekend. Its journey from Russia was tracked by U.S. intelligence community.