"The alleged leaks coming out of government agencies are deeply troubling", Trump said in a prepared statement.
MANCHESTER, ENGLAND- A British official says police in Manchester will stop sharing information about their bombing investigation with the USA until they get a guarantee that there will be no more leaks to the news media.
Identification of victims continues - as of Thursday morning local time 15 people who died in the blast have been named.
After bowing their heads in silence, the grieving crowd in Manchester's St Ann's Square broke into a spontaneous, gentle rendition of "Don't Look Back in Anger" by the city's own Britpop band Oasis.
Days after a suicide bombing at an Ariana Grande concert that left more than 20 people dead and many more injured, women cry after placing flowers in a square at a vigil for the victims of the in central Manchester, England, May 24, 2017. Queen Elizabeth II visited Royal Manchester Children's Hospital, telling 14-year-old Evie Mills and her parents: "It's terrible".
Some 75 people are still being treated in hospital, including 23 in critical condition, medical officials said.
The exposure of sensitive forensic information from the U.K.'s investigation into the Manchester bombing is unprecedented, some national security experts say - and Britain is right to be furious.
Secretary of State Rex Tillerson said on Wednesday that "of course" the United States supports Article 5.
Trump, who led North Atlantic Treaty Organisation allies in paying respects to the victims, slammed the leaks as "deeply troubling".
"I am asking the Department of Justice and other relevant agencies to launch a complete review of this matter, and if appropriate, the culprit should be prosecuted to the fullest extent of the law".
The New York Times published pictures that appear to show remnants of the attacker's backpack and a suspected trigger device and battery from the bomb.
Hinting at the strained relations between the longtime allies, the Manchester police have now cut off the US from receiving intelligence about their investigation of the terrorist attack.
"Having received fresh assurances, we are now working closely with our key partners around the world", he said.
University dropout Abedi, 22, grew up in a Libyan family that reportedly fled to Manchester to escape the now-fallen regime of Libyan dictator Moamer Kadhafi. Meanwhile, Libyan militia this week arrested Salman Abedi's younger brother Hashim and his father Ramadan, who returned to Libya from Britain in 2011 following the ouster of dictator Muammar Gadhafi.
The son of Libyan parents who immigrated to Britain in the early 1990s, Abedi has been identified by British authorities as the bomber who attacked the Ariana Grande concert Monday night.
Abedi had been in Libya in the weeks before the attack, and German magazine Focus, citing unnamed federal security source, reported that he passed through Duesseldorf airport four days before the bombing.
The source said: "MI5 is managing around 500 active investigations, involving some 3,000 subjects of interest [SOIs] at any one time".
"I think he saw children - Muslim children - dying everywhere, and wanted revenge".
"I was very annoyed with him", Norris said, adding that worshippers at his mosque were forbidden to engage in conversations or preaching about politics.
It was the work, reports Phillips, of a relatively sophisticated bomb-maker, with skills the suicide bomber is not thought to have possessed himself.
A British official confirmed Abedi had been on the intelligence radar before the massacre.
Ashour, a member of the UN-backed Government of National Accord (GNA), said the interior ministry's Deterrence Force was in charge of the investigation.
Greater Manchester Police Chief Constable Ian Hopkins said Thursday that it was "absolutely understandable" that the leaks to US media had caused the victims' families distress, but he would not comment on reports by British outlets suggesting intelligence sharing between the two allies would be reduced to some extent as a result.