Newsweek, citing an unnamed "senior Pentagon official," reported late Saturday that authorities believe al-Baghdadi died after setting off a suicide vest as the U.S. special operations raid occurred. Other outlets, including The Associated Press, ABC News and CNN, later published similar reports.
The U.S. military is still working to confirm via "DNA and biometric testing" that al-Baghdadi died, according to CNN.
The news came as President Donald Trump tweeted, "Something very big has just happened!"
Although the White House has not elaborated on Trump's tweet, a spokeswoman said Trump plans to make an announcement at 9 a.m. EDT Sunday, the AP reported.
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The Associated Press contributed to this report.