Ministers and UN officials demand action to preserve the Middle East's cultural relics.
Irina Bokova says that satellite images show "hundreds" of illegal excavations at historic Syrian sites.
United Nations satellite images confirmed the destruction of the temple on Monday.
ISIS militants detonated explosives around one of the most important structures in the world, according to an eyewitness.
Syria's director of antiquities tells Newsweek of his fear that the ancient Bel Temple could be destroyed next.