Russia activates S-400 missile systems in south to guard frontiers

Russia has activated an air defense regiment armed with advanced S-400 surface-to-air missile systems in the Southern Military District to guard its southern frontiers, the Russian military said Tuesday.

"An air defense missile regiment from the Fourth Command of the Air Force and Air Defense entered into service in the Krasnodar region. It is equipped with S-400 Triumph advanced missile systems and Pantsir-S air defense missile and gun complex," the Southern Military District's press service said in a statement.