"Islamic State is looking at potentially vulnerable oil assets in Libya and elsewhere outside its Syria stronghold, where the militant group controls about roughly 80 percent of the oil and gas fields, a senior U.S. official said on Tuesday.

The official, who briefed reporters in Washington on condition of anonymity, said the United States was carefully examining who controlled oil fields, pipelines, trucking routes and other infrastructure in places that could be vulnerable to attack.

Those include in Libya and the Sinai Peninsula, the official added."

Phil Stewart reports for Reuters December 15, 2015. [2]