Air Force Commander Alexander Zelin said.
Zelin did not specify the deployment locations for new S-400 units, but some of them will most likely be placed in the Russian exclave of Kaliningrad as part of the response to the planned European missile shield initiative.
Moscow considers the European missile shield initiative as a threat to its national security.
Many analysts consider this system to be superior to the US Patriot missile system.
Rightardia by Rightard Whitey of Rightardia is licensed under a Creative Commons Attribution 3.0 Unported License.
Permissions beyond the scope of this license may be available at firstname.lastname@example.org.