President Trump tweeted that the attack was the work of a “loser terrorist” as he also suggested it might be a good idea to "cut off the internet" to prevent further terror attacks".
However, his suggestion that those responsible “were in the sights of Scotland Yard” was slapped down by the Prime Minister.
Theresa May said Trump's tweet was not “helpful” and that the police and security services are working to ascertain the “full circumstances” surrounding the attack.
Speaking after chairing a meeting of the Cobra emergency committee, Mrs May said: “I never think it is helpful for anybody to speculate on what is an ongoing investigation. As I have just said the police and security services are working to discover the full circumstances of this cowardly attack and to identify all those responsible.”