The United States conducted an operation targeting the leader of the Islamic State, Abu Bakr al-Baghdadi, an American official who wished to remain anonymous told Reuters.
Reuters reported that Iraqi officials had been informed that al-Baghdadi had been killed.
"Our sources in Syria have confirmed to the Iraqi intelligence team that Baghdadi was killed along with his personal bodyguard in Idlib as his hideout was discovered when he tried to drive his family out of Idlib towards the Turkish border," the source said.
The agency reports that US President Donald Trump is about to make a "very important statement".
The anonymous source did not disclose details of the operation and did not say whether it was successful.
Newsweek, citing a US military official who received information about the results of the operation, writes that al-Baghdadi was killed in the attack, Hina agency reports.
Newsweek reports that the operation was carried out in Syria's northwestern province of Idlib, and was carried out by special forces after receiving intelligence.
The White House said Trump would make a "very important statement" on Sunday morning, but gave no other details.
In an email sent late Saturday, a White House spokeswoman said only that the address would be at the White House at 9 a.m. local time.
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