President Donald Trump announced Sunday in an address to the nation that Joint Special Operations Command team members carried out a missionin Syria's northwestern Idlib province and Islamic State group leader Abū Bakr al-Baghdadi has been found dead.

Al-Baghdadi and his wife both detonated explosive vests they were wearing during the U.S. commando operation, a senior Iraqi security official told The Associated Press

The official spoke on condition of anonymity because he was divulging sensitive information. He added that other IS leaders were killed in the attack.

Baghdadi was an Iraqi national and ultraconservative cleric. Following the 2003 U.S. forces invasion, he joined the Islamist insurgency. He was detained by the U.S. Army at the Abu Ghraib prison before joining Al-Qaeda in Iraq, assuming leadership in 2010. Al-Baghdadi led IS for the last five years, attracting hundreds of thousands of followers to a caliphate in Iraq and Syria.Read the original report below.

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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 PressABC 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.