In January, the Russian military will strengthen the air defense of Crimea by new S-400 missile systems.
Interfax reported this with reference to the Defense Ministry of the Russian Federation.
"A new division set of the S-400 missile systems will go on combat duty in Sevastopol on January 12," the report reads.
The S-400 Triumph missile systems are designed to hit airborne targets at a range of up to 400km (249 miles) and ballistic missiles at a range of up to 60km, flying at speeds of up to 4.8km per second.
The first set of the S-400 systems went on duty in the occupied Crimea in January of 2017.