Libya’s violence and political instability has vexed the United States and other major powers since long-serving ruler Col. Muammar Gaddafi was overthrown by NATO-backed forces in 2011.

Security experts say the turmoil has allowed ISIS to gain a foothold in the North African country, allowing the jihadists a haven from which to train and plan attacks abroad.

And while ISIS is blamed for attacking Libya’s oil fields in recent months, experts strongly disagree with a claim GOP frontrunner Donald Trump repeated on April 27 during his foreign policy speech in Washington.

"And now ISIS is making millions of dollars a week selling Libyan oil," Trump said in the speech.

Our research

Experts and news articles say ISIS has attacked Libya’s oil fields to disrupt oil markets and prevent rival groups from making a profit. But, they say, the group does not have the ability to operate the country’s few and complex oil refineries.

This all contradicts Trump’s assertion.

David Mack , an expert on Libya and terrorism with the nonpartisan Middle East Institute, called Trump’s claim "absolutely untrue."

"I don’t know where he got this gem of misinformation," he told PolitiFact.

Claudia Gazzini, a Tripoli-based senior analyst at the International Crisis Group, also rejected Trump’s statement.

Gazzini said in an email to PolitiFact: "While it is true that ISIS has attacked oil fields in the Sirte basin area and destroyed key equipment there, they have not sought to keep control of the oil fields.

"At the moment they appear to have adopted a hit-and-run strategy. There is no evidence that they are pumping out the crude oil and certainly no evidence that they are trading it. At the moment they just appear interested in starving the Libyan state of oil revenues."

Gazzini made the same comments to the Washington Post Fact Checker when it examined a similar comment Trump made on NBC’s Today show on April 21. The Post gave Trump four Pinocchios, which it reserves for only the biggest falsehoods.

The West Point-based Combating Terrorism Center also examined the ISIS/Libyan oil question. In a March 17 report it stated: "It is simply hard for the Islamic State to do much in (Libya’s oil fields) beyond episodic attacks."

Trump’s campaign did not respond to a request to explain his comment.

Our ruling

Trump said, "ISIS is making millions of dollars a week selling Libyan oil."

Experts and news reports say ISIS has attacked Libya’s oil fields in recent months, amid the country’s instability. But they roundly reject Trump’s claim that ISIS jihadists based in that country have been able to seize, refine and sell the oil for "millions of dollars a week." Instead, they say, the terrorist group is focused on disrupting oil markets and preventing rivals from getting the oil in Libya.

We rate the claim False.