Donald Trump said he will "get to the bottom" of recent leaking of evidence from the Manchester terror attack by US officials.
In a statement at Nato, the US President said the leaks were "deeply troubling", adding that they "pose a grave threat to our national security".
It was reported earlier today that British police have ceased sharing information about the Manchester attack with the US after a series of leaks.
US officials released the name of the suspected bomber, Salman Abedi, on Tuesday, before UK authorities had published the same detail.
Meanwhile, photos appearing to show debris at the scene of the attack were published in the New York Times yesterday.
An explosion at an Ariana Grande concert at the Manchester Arena killed 22 people, including children, and left dozens injured.