Donald Trump says US forces killed Abu Bakr al-Baghdadi in a "daring and dangerous" early morning raid by US Special Forces on Sunday.
In a press conference at the White House the US president told media that al-Baghdadi killed himself by detonating a suicide vest while being pursued in a tunnel in northern Syria.
What does this mean for the conflicts in Syria and how has the fairly unusual announcement been received in the US? Our correspondent Harry Horton joins us from Washington.