It was the second time that warships have been used since the start of the bombing campaign on September 30.

Russia Defense Minister says cruise missile strikes against one target near the ISIS-controlled city of Deir Ezzor had killed 'more than 600 fighters'.

Minister Shoigu also told President Putin that Russian planes destroyed 15 oil refining and storage facilities in Syria and 525 trucks carrying oil during this week’s bombing blitz. He said this deprived ISIS of $1.5million in daily income from oil sales. 

Russian Tu-160 escorted by an Su-30SM

According to London based Syria human rights observatory ‘This is the first time Deir Ezzor has experienced strikes of this intensity,’ the monitor said. 

Russia has also doubled the number of jets it has based in government-held territory in Syria to 69 over the past few day.

Russian Tu-160 bomber

Moscow flew more than 100 combat sorties on Thursday, following 126 the day before.

Colonel General Andrei Kartapolov said that Russian warplanes were focusing their strikes on the ISIS oil production and refining facilities as well as oil trucks.

Paris also launched air strikes against ISIS’s Syrian stronghold in Raqqa this week, following attacks that killed 130 people in the Paris terrorist attacks.