British officials are expressing frustration with President Trump's response to a terror attack in London on Friday, calling his comments "unhelpful".
She dismissed the speculative tweet from Trump that claimed Scotland Yard had the so-called "bucket bomber" in terror attack on a London Underground train in their "sights". He also said that terrorists "must be dealt with in a much tougher manner".
He added: "The internet is their main recruitment tool which we must cut off & use better!"
Later, in an appearance at the White House Rose Garden, Mr Trump said the country must be "smarter" when it comes to terrorism. At the time, he said: "When I make a statement, I like to be correct".
And the White House said Mr Trump had pledged close collaboration with the United Kingdom "to stop attacks worldwide targeting innocent civilians and to combat extremism".
A senior USA government official cast doubt on whether Trump was privy to information over whether the bomber in the west London attack was known or not.
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"I think he means generally that this kind of activity is what we're trying to prevent, and so these organizations that are responsible for it, whatever comes out of this investigation, that remains to be seen", McMaster said.
It's also worth noting that in the past Donald Trump said that he was going to talk to Bill Gates about possibly shutting down the internet as is somehow Bill Gates has a massive switch in his house that just turns the internet on and off or that he really has any sway over whether or not the internet actually works.
Khan, the British capital's first Muslim leader, called the tweet "ill-informed".
"We have made more progress in the last nine months against ISIS than the Obama Administration has made in 8 years", he said. "Must be proactive & nasty!" We need the courts to give us back our rights.
The official said that at this point, USA agencies had no information to back up any suggestion by Trump that Britain had advance warning or specific intelligence on the attack. Photos showing crime scene evidence appeared in US media; the bombing suspect's name was revealed while British officials were still withholding it. Trump said May was "very angry" over the leaks.
After the Manchester Arena attack, intelligence from the United Kingdom investigation - including the name of the attacker and photos of his device - was leaked by USA government sources to the American media.