President Donald Trump on Thursday described USA intelligence leaks over the Manchester bombing as "deeply troubling" and threatened to prosecute those responsible, after a warning by British Prime Minister Theresa May to keep shared data "secure".
Britain pressed a manhunt Thursday for a Libya-linked jihadist network thought to be behind the deadly Manchester bombing as US President Donald Trump threatened to prosecute those responsible for leaking details from the investigation to US media.
With the official threat level raised to "critical", meaning a further attack could be imminent, troops have been deployed to free up police, and armed officers patrolled trains for the first time in Britain.
May said around 1 000 soldiers were assisting police "providing important reassurance ahead of a bank holiday weekend of busy events".
Her spokesman said: She expressed the view that the intelligence sharing relationship we have with the United States is hugely important and valuable, but that the information that we share should be kept secure.
"It leaves our North Atlantic Treaty Organisation allies desperately concerned about whether or not the United States is going to be for them, as we've promised to and as they were for us after 9-11", says Jake Sullivan, a former National Security Advisor to Vice President Biden.
Police announced two new arrests on Thursday, bringing the total to eight people in custody in Britain.
Monday's attack, which came as people were leaving an Ariana Grande concert, took the lives of at least 22 people, including several children.
Officials in Britain are incensed over details of the Manchester bombing investigation finding their way into the news.
Two U.S. officials from different agencies said photos of remnants of the Manchester bomb, which killed 22 people, and other evidence that U.S. officials allegedly leaked were of what one of them called "limited intelligence and law enforcement value".More news: Donald Trump US President meets European Union chiefs in Brussels
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A Turkish official said Abedi had transited through Istanbul's Ataturk airport "recently" and did not enter Turkey.
Queen Elizabeth II visited the Royal Manchester Children's Hospital on Thursday, meeting with staff and some of the attack victims.
British Prime Minister Teresa May earlier spoke to Mr Trump at a North Atlantic Treaty Organisation summit in Brussels to say intelligence shared between their two countries had to remain secure.
British investigators are now refusing to share information about the case with USA law enforcement.
The attack injured 116 people, of whom 75 were admitted to hospital and 23 remain in a very serious condition, health authorities said.
The bombing has caused revulsion across the world for targeting children and teenagers.
Former U.S. President Barack Obama, meeting German Chancellor Angela Merkel at an event in Berlin, said the pair were "heartbroken", while Trump told fellow North Atlantic Treaty Organisation leaders the attack was "savage" and "barbaric".
But Trump critics, including some USA intelligence officials, call his complaint ironic after he gave highly sensitive information about a foreign country's covert operation against Islamic State to senior Russian officials in a White House meeting this month.
The GMP shares its information with National Counter-Terrorism, which then shares the information throughout the British government and the United States, Australia, Canada and New Zealand as part of an agreement. May said at the time Britain would continue to share information with Washington.
The New York Times published images that appeared to show remnants of the attacker's backpack and a suspected trigger device and battery from the bomb.