President Donald Trump said on Thursday that "deeply troubling" leaks to US media about the Manchester suicide bombing would be investigated, after irate British police stopped sharing information with USA agencies.
Earlier today, a man was arrested in connection with the suicide attack at the concert by American actress-singer Ariana Grande at Manchester Arena on Monday night.
Abedi's father claims his son had no terrorist connections, but images taken from security footage are believed to show the 22-year-old at a shopping center three days before the attack where he may have bought a blue backpack he's seen wearing to later carry the bomb, CBS2's Janelle Burrell reported.
The New York Times also published eight photographs of what appeared to be evidence taken by British forensic teams after a suicide bomber detonated a device in the foyer area of Manchester Arena. He said he is asking the Justice Department and other agencies to "launch a complete review of this matter".
The mother of eight-year-old Saffie Roussos, the youngest person killed in the bombing, is thought to be among those still critical. On March 22, five people were killed and more than 50 injured when a man ploughed into pedestrians on Westminster Bridge in central London.
Williams said "covert and discrete tactics" will also be in place to protect the transport network. Though his neighbors tell NPR they did not know him well, some of them recall an incident in which a resident complained to police several years ago that members of the Abedi family had shown signs of radicalization.
Britain's terror threat assessment has been hiked to "critical", the highest level, meaning an attack is considered imminent.
Investigators are trying to find whether Abedi knew several Manchester-based jihadis, including Libyan man Abdalraouf Abdallah, who was jailed in the United Kingdom for terror offenses, and Raphael Hostey, an IS recruiter killed in Syria.
Elders at the south Manchester mosque believed to have been frequented by Abedi insisted that his actions were wholly alien to their preaching, and pointed the finger at online radicalisation. 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".
"Our response to this violence must be to come closer together, to help each other, to love more, to sing louder and to live more kindly and more generously than we did before", she said.
At one apartment building in Manchester, heavily armed police swarmed in and a controlled explosion was heard.
Manchester-born Abedi, a university dropout, grew up in a Libyan family in the northwestern English city.
Citing unnamed federal security sources, Focus reports that British-born Salman Abedi twice flew from a German airport in recent years and wasn't on any worldwide watch list.
May's governing Conservatives and the Labour main opposition agreed to resume local campaigns on Thursday and national campaigning on Friday.