Amber Rudd is refusing to say if the Parsons Green suspect was known to police a day after Donald Trump said the bomber was ‘in the sights of Scotland Yard’.
Yesterday the US president embarrassingly claimed police were aware of the suspect before the explosion, which injured 30 people.
But today the home secretary would not be budged on whether the counter terror had information on the attacker.
Theresa May (pictured in No 10 this afternoon) said any speculation was unhelpful when asked about the President’s tweets on the Parsons Green attack
![Trump tweeted: '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!'](https://i.dailymail.co.uk/i/pix/2017/09/15/16/444DE35E00000578-4887636-Trump_tweeted_Another_attack_in_London_by_a_loser_terrorist_Thes-a-82_1505488776759.jpg)
Trump tweeted: ‘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!’
![He later walked back on his controversial comments, tweeting: 'Our hearts and prayers go out to the people of London, who suffered a vicious terrorist attack'](https://i.dailymail.co.uk/i/pix/2017/09/15/23/4453FC6100000578-4887636-He_later_walked_back_on_his_controversial_comments_tweeting_Our_-a-2_1505513230499.jpg)
He later walked back on his controversial comments, tweeting: ‘Our hearts and prayers go out to the people of London, who suffered a vicious terrorist attack’
The US President took to social media within hours of the attack to claim the suspect was ‘in the sights of Scotland Yard’.
He added: ‘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!’
His comments drew a swift rebuke from the Prime Minister, who said: ‘I never think it’s helpful for anybody to speculate on what is an ongoing investigation.’
She later challenged the president in person when he called her to discuss the case.
Today Home Secretary Amber Rudd has described the arrest of an 18-year-old man in connection with the Parsons Green terror attack as ‘very significant’, but added: ‘The operation is ongoing.’
Investigators – who it is understood are linking the attack to Islamist extremism – are continuing their probe and the threat level remains at critical, which means a further attack is feared to be imminent.
The country’s top counter-terrorism officer indicated that a potential network of plotters could have been involved.
A Scotland Yard spokesman criticised Mr Trump, saying: ‘The comments are unhelpful and pure speculation. If anyone has got any evidence or information, please contact the anti-terrorism hotline.’
Although Mr Wallace said this morning that although it was ‘not helpful to have a running commentary on a live investigation’ he said about Trump’s later tweets: ‘I saw his follow-up statements. I think his sentiment was that the international community stands together in facing this threat.
‘I think we can take that as being a good thing.’
Mrs May’s former chief-of-staff Nick Timothy commented on Twitter, saying: ‘True or not – and I’m sure he doesn’t know – this is so unhelpful from leader of our ally and intelligence partner.’
Mr Trump appeared unconcerned about his diplomatic slip. Asked about the terror attack by reporters outside the White House, he said: ‘It’s a terrible thing.
‘It just keeps going and going, and we have to be very smart, we have to be very, very tough. Perhaps we are not nearly tough enough. It’s just an absolutely terrible thing. In fact, I’m going to call the Prime Minister right now.
![Met terror chief Mark Rowley updated the media on the investigation this morning (pictured) but has not given any details of any man hunt](https://i.dailymail.co.uk/i/pix/2017/09/15/14/444E27B200000578-4887636-image-a-55_1505481860736.jpg)
Met terror chief Mark Rowley updated the media on the investigation this morning (pictured) but has not given any details of any man hunt
![U.S. National Security Advisor H.R. McMaster (right) told reporters at the White House on Friday that Trump wasn't speaking about any particular terror suspect when he claimed Scotland Yard had already had Friday's Tube bomber on its radar](https://i.dailymail.co.uk/i/pix/2017/09/15/19/4451845200000578-4887636-image-a-58_1505499951043.jpg)
U.S. National Security Advisor H.R. McMaster (right) told reporters at the White House on Friday that Trump wasn’t speaking about any particular terror suspect when he claimed Scotland Yard had already had Friday’s Tube bomber on its radar
![President Donald Trump has claimed Scotland Yard knew ahead of time about a bomber or bombers who set off a crude incendiary bomb Friday morning on London's 'Tube' subway](https://i.dailymail.co.uk/i/pix/2017/09/15/11/444C576300000578-4887636-image-a-47_1505472744108.jpg)
President Donald Trump has claimed Scotland Yard knew ahead of time about a bomber or bombers who set off a crude incendiary bomb Friday morning on London’s ‘Tube’ subway
‘We have to be tougher and we have to be smarter.’ He told reporters that he had been briefed on the explosion, but did not provide further details.
His national security adviser HR McMaster suggested later that Mr Trump was speaking generally.
Noting that law enforcement agencies have been working to combat terrorism for years, Mr McMaster said: ‘I think if there was a terrorist attack here, God forbid, that we would say that they were in the sights of the FBI.’
He added: ‘I think he means generally that this kind of activity is what we are trying to prevent.’
The controversy threatened to reopen the row between the UK and the US over the leaking of sensitive police information that led to the temporary suspension of security co-operation in the wake of the Manchester bombing.
Labour MP Stephen Doughty, a member of the home affairs select committee, said last night Mr Trump’s intervention ‘has the potential to not only undermine a vital relationship, but also to prejudice investigations into this and other incidents’.
Liberal Democrat home affairs spokesman Sir Ed Davey said: ‘It is insulting to the victims of this attack that Donald Trump is already using it to try and further his divisive political agenda. Once again, Trump has shown he is not fit for the office of US President.’
London Mayor Sadiq Khan, who clashed with Mr Trump over his response to the London Bridge terror attack, would not be drawn on the president’s comments. ‘I’ve simply been too busy to look at my Twitter,’ he said. ‘My priority is making sure that we do what we can to keep Londoners safe.’
![Trump added: 'Loser terrorists must be dealt with in a much tougher manner. The internet is their main recruitment tool which we must cut off & use better!'](https://i.dailymail.co.uk/i/pix/2017/09/15/11/444DECD100000578-4887636-image-m-52_1505472896765.jpg)
Trump added: ‘Loser terrorists must be dealt with in a much tougher manner. The internet is their main recruitment tool which we must cut off & use better!’
![Theresa May's former adviser Nick Timothy reacted to Trump's intervention by saying the president 'doesn't know' anything: 'This is so unhelpful from leader of our ally and intelligence partner'](https://i.dailymail.co.uk/i/pix/2017/09/15/17/444E028600000578-4887636-Theresa_May_s_former_adviser_Nick_Timothy_reacted_to_Trump_s_int-a-4_1505493241142.jpg)
Theresa May’s former adviser Nick Timothy reacted to Trump’s intervention by saying the president ‘doesn’t know’ anything: ‘This is so unhelpful from leader of our ally and intelligence partner’
![Metropolitan Police officers were continued detailed searches and investigations at the scene of the bombing today (pictured)](https://i.dailymail.co.uk/i/pix/2017/09/15/17/444DA1B900000578-4887636-Metropolitan_Police_officers_were_continued_detailed_searches_an-a-1_1505493241034.jpg)
Metropolitan Police officers were continued detailed searches and investigations at the scene of the bombing today (pictured)
![Police in and around London are hunting for the 'bucket bomber' who tried blow up a rush hour Tube train amid claims that he is armed and may have left other devices](https://i.dailymail.co.uk/i/pix/2017/09/15/12/444D030400000578-4887636-image-a-59_1505473550472.jpg)
Police in and around London are hunting for the ‘bucket bomber’ who tried blow up a rush hour Tube train amid claims that he is armed and may have left other devices
![The crude device could have killed dozens but failed to properly detonate and sent a 'wall of fire' through a subway car, injuring at least 22 people including a ten-year-old boy](https://i.dailymail.co.uk/i/pix/2017/09/15/15/444DEBE500000578-4887636-The_crude_device_could_have_killed_dozens_but_failed_to_properly-a-80_1505487455688.jpg)
The crude device could have killed dozens but failed to properly detonate and sent a ‘wall of fire’ through a subway car, injuring at least 22 people including a ten-year-old boy