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The president also offered US assistance for the investigation into the Manchester concert attack. The call came shortly after Mr Trump denounced those responsible for the atrocity as "evil losers" and called for the ideology behind the outrage to be "completely obliterated". The US president was one of a number of world leaders the Prime Minister spoke to by phone after chairing a meeting of the Government's Cobra emergency committee in Whitehall.

GETTY Donald Trump made a phone call to Theresa may to deliver his message on the Manchester attack

The White House said Mr Trump and Mrs May agreed the targeting of teenage children enjoying a concert was "particularly wanton and depraved”. And a spokesman said: "The president reassured the Prime Minister that Americans stand with the people of the United Kingdom and that our resolve will never waver in the face of terrorism. “He offered American aid in the United Kingdom's investigation and vowed to continue the mutual fight against terrorism."

Manchester bombing: Heartbreaking photos from the morning after Tue, May 23, 2017 As the country wakes to the news of the worst terror attack on British soil in a decade, Manchester comes to terms with last night's terrible events Play slideshow Getty Images 1 of 19 Vikki Baker and her daughter Charlotte, who were at the Ariana Grande concert, leave the Park Inn, where they were given refuge

Speaking during a visit to Bethlehem, in the Palestinian West Bank, Mr Trump said: "I extend my deepest condolences to those so terribly injured in this terrorist attack and to the many killed and the families - so many families - of the victims.

We stand in absolute solidarity with the people of the United Kingdom Donald Trump

"We stand in absolute solidarity with the people of the United Kingdom." Mr Trump said: "So many young, beautiful, innocent people, living and enjoying their lives, murdered by the evil losers in life. "I won't call them 'monsters', because they would like that term. They would think that a great name.

GETTY The president urged that Americans stand with the people of the United Kingdom

GETTY Earlier, Mr Trump denounced those responsible for the explosion as 'evil losers'

"I will call them from now on 'losers', because that is what they are. They are losers. We will have more of them, but they are losers, just remember that." Mr Trump added: "Our society can have no tolerance for this continuation of bloodshed. We can't stand a moment longer for the slaughter of innocent people - and in today's attack, it was mostly innocent children. "The terrorists and extremists and those who give them aid and comfort must be driven out from our society forever.

Mourning for Manchester: The world pays tribute Thu, May 25, 2017 Makeshift memorials and tributes to victims of the deadly attack at an Ariana Grande concert. Play slideshow REUTERS 1 of 41 Britain's Queen Elizabeth visits the Royal Manchester Children's Hospital in Manchester