Theresa May reacts to Donald Trump's 'unhelpful' London bombing tweet

A manhunt is on to find those behind the bombing that wounded 22 people on a Friday morning rush-hour subway train.

The president said he planned to call British Prime Minister Theresa May "right now".

Scotland Yard also reportedly commented on Trump's tweet saying that it was "unhelpful and pure speculation".

President Donald Trump on Friday blasted the "loser terrorists" behind the train attack in London that injured at least 18 people. His hasty tweets about London stand in stark contrast to the notable crickets surrounding Charlottesville, proof that timing really does say it all.

Assistant Commissioner Mark Rowley of the Metropolitan Police, a top counterterrorism official, said at a news conference that the bomb was "an improvised explosive device", and he urged anyone who had seen what happened, or had taken photos or videos of the incident, to come forward.

On Twitter, he advocated for a "far larger, tougher and more specific" travel ban, adding, "but stupidly, that would not be politically correct!" "It just keeps going and going", and suggested that the US may not be tough enough on terror.

Authorities in London are still investigating the attack, and it's not immediately clear who was responsible or what Trump was referring to in suggesting that the perpetrators were known to authorities.

In last one year, the United Kingdom has been the target of a string of Islamist-related terrorist attacks.

Trump tweeted Friday: "Another attack in London by a loser terrorist".

Under the order, foreign nationals are banned for 90 days from six countries - Iran, Syria, Sudan, Somalia, Libya, and Yemen - and refugees lacking a link to the USA are barred for 120 days.

It was at 6.42am in Washington that Donald Trump tweeted himself into another diplomatic row with the UK.

As for the travel ban, A.P. notes that remains tangled in the court systems with the Supreme Court scheduled to listen to arguments on October 10.

The travel ban bars certain people from Iran, Libya, Somalia, Sudan, Syria and Yemen from entering the US.

Trump has repeatedly pointed to his travel ban as a cornerstone of his counterterrorism platform. His post comes ahead of a key Supreme Court hearing next month on the constitutionality of his executive order on the ban.

  • Tracy Klein