Two Russian Navy Project 11356 frigates and a Kilo-class submarine have fired six Kalibr cruise missiles at Islamic State positions in Syria, Russian media reported the ministry of defense as saying.
The ministry said the strikes hit IS command and control centers in Hama, Syria, adding that it was followed by airstrikes.
The Kalibr missiles were fired from two new Russian frigates, Admiral Grigorovich and Admiral Essen, which joined the Russian Navy in March 2016 and June 2016, respectively.
Admiral Grigorovich deployed to the Mediterranean in February this year with the Essen following suit in May.
The submarine that took part in the strike was the Project 636.6 diesel-electric submarine Krasnodar which, together with Admiral Essen, already participated in a similar strike on May 31. Four Kalibr missiles were launched in that attack.
Bellow is a Russian Ministry of Defence video of the June 23 attack.