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.
United Kingdom media reported that the woman's husband is "critically ill" and her two children were also injured in the Monday night suicide bombing at the Manchester Arena shortly after the close of the Ariana Grande show. There were four children in the family in total - three boys and one girl. "Very wicked, to target that sort of thing". Abedi, a 22-year-old British citizen born to Libyan parents, died in the attack.
Twelve of the injured are under 16.
May is expected to raise the matter with U.S. President Donald Trump when she meets him at a North Atlantic Treaty Organisation meeting later Thursday in Brussels. "This is not us", he said.
"Who's leaking it? Where's it coming from?"
Authorities believe Abedi had help in building the bomb, which photographs published by the New York Times showed was sophisticated and powerful, and that his accomplices could be ready to strike again.
British police have stopped sharing information on the Manchester suicide bombing with the USA, the BBC reports, because of fears leaks in the American media could hinder a hunt for a possible bomb maker.
"We greatly value the important relationships we have with our trusted intelligence, law enforcement and security partners around the world", a spokesman said.
Although the group disbanded, the former official said the father belongs to the Salafi Jihadi movement, the most extreme sect of Salafism from which Al Qaeda and ISIS hail.
Officials said all the dead and wounded had been identified.
Egypt: Gunmen kill at least 23 people in bus attack
Egyptian security and medical officials told the Associated Press news agency that the death toll in the shooting has risen to 28. An Islamic State campaign of murders in North Sinai prompted hundreds of Christians to flee in February and March.
Hashem, Abedi's brother, had been "under surveillance for a month and a half" and "investigation teams supplied intelligence that he was planning a terrorist attack in the capital Tripoli", the Deterrence Force said on its Facebook page. On Tuesday the first victims to be named were 18-year-old Georgina Callander, eight-year-old Saffie Rose Roussos and 28 year old John Atkinson.
"I think he saw children - Muslim children - dying everywhere, and wanted revenge". Her French counterpart Gerard Collomb said he had links with Islamic State and had probably visited Syria as well.
Islamic State, now being driven from territories in Syria and Iraq by Western-backed armed forces, claimed responsibility for the attack. British officials, however, have not commented on whether Abedi had links to IS or other extremist groups.
The MI5 domestic security service is managing around 500 active investigations, involving some 3,000 "subjects of interest", the senior government ministry source said.
May said on Thursday that eight people are in custody - following the arrests of two more people earlier in the day - as the investigation continues into the deadly attack at an arena where American singer Ariana Grande had just finished her performance.
Leaks from an investigation into the Manchester terror attack are undermining the investigation, British police said on Thursday as the BBC reported that police had stopped sharing information with the United States.
Residents were later allowed to return.
May said the national threat level remains critical - meaning another attack may be imminent.
Armed troops have been sent to guard key sites, a rare sight in mainland Britain.
An off-duty police officer was among those killed in an attack by a suicide bomber in Manchester Arena.
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