>> As London grapples with an attack on a commuter train Friday, which the Islamic State has claimed responsibility for. The American President is rattling British officials by jumping into the fray, tweeting soon after news of a homemade explosive device on a London train which failed to fully detonate, the President wrote quote, another attack in London by a loser terrorist.
These are sick and demented people who were in the sights of Scotland Yard, must be proactive. But British officials quickly responded saying, speculation wasn't helpful. But was it speculation or did he let classified information slip. Reuters national security correspondent, Mark Hosenball, in London.>> It doesn't seem at this point, based on conversations I've had with people in multiple buildings in the western area, to be any evidence that the US had any advance knowledge of this possible attack, or the British had any such advance knowledge.
Where Trump got this idea, that the British should go crack down on these people because they know who they are, just everybody seems to be mystified by this.>> Trump's Tweet appearing to point the finger at British police, an assertion which the British Prime Minister countered.>> Prime Minister, Donald Trump has intervened to say this was carried out by people who Scotland Yard had in it's sights Does he know something we don't?
>> I never think it's helpful for anybody to speculate on what is an ongoing investigation.>> The President also using the unfolding attack to push for his beleaguered travel ban. In a tweet he said his ban, which critics have dubbed a Muslim ban, should be, quote more specific, but stupidly that would not be politically correct.
>> Just keeps going and going and we have to be very smart. We have to be very, very tough.>> This all comes just a few months after the US angered British officials for leaking information on an investigation into the Manchester bombing, which killed 22 people in May.