President Donald Trump will make a statement at 9 a.m. Sunday, the White House said.
It did not provide additional details, but the statement will come after sources told NBC News that Islamic State group leader Abu Bakr al-Baghdadi was the target of a deadly U.S.-led raid in northwestern Syria.
Trump hinted at the news late Saturday.
“Something very big has just happened!” he said on Twitter.
The president personally approved the operation, according to two people familiar with the matter.