The submarine built in St.Petersburg was equipped with Kalibr cruise missiles which it can launch while been submerged.

On the way from the Baltic to the Black Sea, "Rostov-on-Don" launched several missiles at the ISIS positions in Syria.

Rostov-on-Don submarine launching Calibre cruise missiles in the Mediterranean Sea during a strike against ISIS terror group positions in Syria.

The submarine will be based in the Russian naval base of Sevastopol.

It is the second submarine which joined the Russian Black Sea Navy in the past three months. Four more similar submarines will arrive in Sevastopol in the coming years.