ISIS terrorists seized the ancient Syrian town of Palmyra, a UNESCO World Heritage site that's home to historical artifacts and structures from biblical days.
The terror group's capture comes just days after it took over Ramadi, a key Iraqi city that was at one time staunchly defended by members of the U.S. military.
BBC reported ISIS hadn't yet destroyed any artifacts in Palmyra, which is also nearby crucial oil and gas fields Syria's government uses to supply electricity for citizens and businesses.
"The fighting is putting at risk one of the most significant sites in the Middle East," said Irina Bokova, director general of UNESCO, in a statement reported by the New York Times.
The recent ISIS geographical wins come as the White House continues to downplay the terror group's abilities, saying just this week the fall of Ramadi was a "setback," not policy failure, that shouldn't be seen as unexpected.