The US military has carried out an operation against the leader of IS.
According to US media reports, raids have been conducted in Syria targeting Abu Bakr al-Baghdadi.
The White House said US President Donald Trump is scheduled to make a "major statement" later on Sunday.
Meanwhile Trump tweeted that "Something very big has just happened!"

Iran threatens painful response if US renews attacks
Ukrainian drones hit Russian port of Tuapse for the fourth time
Detained Myanmar ex-leader Suu Kyi to meet legal team this weekend
UK police charge man over stabbing attack in London