Story highlights

• Kremlin releases footage which suggests ISIS ready to raze parts of historic Syrian city
• Militants have destroyed much of Palmyra since occupying it in May 2015

(CNN) ISIS' vandalism of one of Syria's most important historic sites looks set to escalate as Russian intelligence suggests that the militant group plans to wreak more destruction on the ancient Roman ruins at Palmyra.

CNN's Jomana Karadsheh, Kareem Khadder and Lauren Said-Moorhouse contributed to this report.

For more on this story and video  go to: http://edition.cnn.com//2017/02/13/middleeast/palmyra-isis-new-destruction-planned/index.html