The Russian military has launched cruise missiles against Islamic State positions in Syria from both the Mediterranean and Caspian seas, one of which killed over 600 terrorists in the Deir Ex-Zor Province, Russian Defense Minister Sergey Shoigu has said.

Islamic State (IS, formerly ISIS/ISIL) have been suffering huge losses as a result of the Russian offensive, Shoigu said, adding that data on the ground shows that the flow of terrorists arriving in Syria has decreased, while more and more militants are fleeing the warzone to head north and south-west.
Over the past four days, Russian air forces have conducted 522 sorties, deploying more than 100 cruise missiles and 1,400 tons of bombs of various types, the minister stated.
He added that a strike on a target in Deir ez-Zor utilizing multiple cruise missiles had killed more than 600 militants.Shoigu stressed that the number of aircraft taking part in the operation has been doubled, and now consists of 69 jets conducting 143 sorties on a daily basis.