Security experts told the Times that Abedi's deployment of an improvised explosive device outside the Arena showed a level of sophistication that implied he had collaborators and the possibility that other bombs had been made at the same time. AQIM is believed by the U.S. to be mainly in south western Libya and trying to regain a higher profile after months of global attention being paid to ISIS, the officials said. "This is not us".
"We were making our way out and when we were right by the door there was a massive explosion and everybody was screaming", concert-goer Catherine Macfarlane told Reuters.
Wednesday's announcement brings the total number of attack-related arrests to four, following an arrest announced Tuesday.
And there were reports that members of the public blew the whistle on Abedi several years ago by reporting him to the anti-terrorism hotline.
A spokesperson for the Libyan authorities told BBC: "His brother felt there was something going on there in Manchester and he thought his brother would do something like bombing or attack".
Citing an unnamed government source, British newspaper The Guardian reported United Kingdom officials "are furious" over the leaks that are "completely unacceptable".
Cheshire Police confirmed that one of its female officers died while off-duty at the concert but have not named her.
The bomber was born in Britain to immigrants from Libya.
"We have been carrying out searches at an address in the Withington area and a man has been arrested".
In March, a British-born convert to Islam plowed a auto into pedestrians on London's Westminster Bridge, killing four people, before stabbing to death a police officer who was on the grounds of parliament.
On Tuesday evening (May 23), The British government, wary of additional possible attacks, raised the national terror threat level to "critical". Hundreds of British troops have also been deployed to back up the police.
Manchester/London: British Prime Minister Theresa May said on Thursday she would tell US President Donald Trump that intelligence shared between their two countries had to remain secure after leaks to US media about the Manchester attack. Numerous victims were young children. Police are trying to establish if bomber Salman Abedi acted alone or whether there could be a risk of further attacks.
Among the horror and with many questions to come, Toni Street says we must remember the majority of humankind is good.
More than 110 people were injured in the attack which was later claimed by the Islamic State.