US special forces have killed a senior group leader from the so-called Islamic State group and captured his wife in eastern Syria, the Pentagon said.
The militant was identified as Abu Sayyaf, who helped direct the group's oil, gas and financial operations.
He was killed when he engaged US forces, the statement said.
The raid was carried out at the direction of President Barack Obama.
The President's spokeswoman on national security matters, Bernadette Meehan said in a statement: "Last night, at the president's direction, US personnel based out of Iraq conducted an operation in al-Amr in eastern Syria to capture an ISIL senior leader known as Abu Sayyaf and his wife Umm Sayyaf."
"During the course of the operation, Abu Sayyaf was killed when he engaged US forces."
Ms Meehan added: "Umm Sayyaf was captured and is currently in US military detention in Iraq.
She also said the operation had led to a young Yazidi woman, thought to have been held as a slave, being freed.
The Yazidis, a religious minority in northwest Iraq with ancient origins, have been persecuted by the IS jihadists and rights groups say Yazidi women have been kidnapped, raped and sold among the extremists.
US officials suspect the militant's wife "played an important role in ISIL's terrorist activities, and may have been complicit in the enslavement of the young woman rescued last night," the White House said.
The American forces went after Sayyaf in Al-Omar in eastern Syria, one of the country's biggest oil fields.
US forces suffered no casualties in the night raid, officials said, without offering details about how many troops were involved or what units were deployed.
US commandoes staged a raid in Syria last year to rescue an American journalist held hostage by the IS, James Foley.
But the operation failed, and Foley and other hostages had been moved by the time the US forces arrived.
Sayyaf, the senior militant targeted in the latest raid, was involved with IS military operations and had a "a senior role in overseeing ISIL's illicit oil and gas operations," the White House said.
Th oil smuggling provides "a key source of revenue that enables the terrorist organisation to carry out their brutal tactics and oppress thousands of innocent civilians."
The raid was carried out with the full approval of the Iraqi government, officials said.
"The United States will continue to stand shoulder-to-shoulder with our Iraqi partners in our effort to degrade and ultimately destroy ISIL," Ms Meehan said.
