"The public should be clear about what this means".
Top intelligence and security officials in Britain's Joint Terrorism Analysis Centre (JTAC) on Tuesday raised the threat level to "critical" - meaning an attack is expected imminently - the day after the attack.
While police and politicians have praised communities in Manchester for their reaction to the bombing, Greater Manchester Police Chief Constable said there had been a rise in reported hate crimes, from an average of 28 to 56 incidents on Wednesday.
On his back a rucksack is visible, which detectives believe could have held the explosive that tore through crowds exiting the Manchester Arena.
The photos released by police show attacker Abedi, a Briton of Libyan descent, on the night of the bombing, wearing sneakers, jeans, a dark jacket and a baseball cap.
Armed officers will remain deployed on the streets throughout Britain until Monday, with security stepped up at around 1,300 events over the bank holiday weekend.
British police have stopped sharing information on the suicide bombing in Manchester with the United States, the BBC reported on Thursday, because of fears that leaks to the U.S. media could hinder a hunt for a possible bomb-maker still at large.
Armed police on guard prior to the start of the Great CityGames at Deansgate, in Manchester, England, Friday May 26, 2017.
Prime Minister Theresa May said Saturday that a "severe" threat level meant another attack was still highly likely and that citizens should remain vigilant. Chelsea Football Club canceled a Sunday parade to honor its Premier League victory.
He says police want the approach to be "unpredictable" and to make London "as hostile an environment as possible to terrorists".
What's happened in the investigation?
In a statement released on Saturday night, hours after the terrorism threat level in the United Kingdom was reduced from critical to severe, Greater Manchester's police chief, constable, Ian Hopkins and its deputy assistant commissioner, Neil Basu, senior national coordinator United Kingdom counter-terrorism policing, said the investigation was making good progress. Rudd noted that 11 people remain in custody in relation to the investigation.
Police said they are still searching 14 locations and have carried out 17 warrants, mostly in Greater Manchester.
One search was at an apartment in a Manchester high-rise that British media say was rented by Abedi in the months before the attack.
They were invited to take part after the Manchester 10k and Mr Wyeth said the occasion was all the more poignant following Monday's bombing.
What about the Libya connection? The militia also arrested the brothers' father, Ramadan al-Abedi. More than 20 people were killed in an explosion following a Ariana Grande concert at the Manchester Arena late Monday.
A 38-year-old man is arrested in Blackley, north of Manchester. Dozens more were wounded, and as of Thursday, 23 survivors were in critical care in Manchester hospitals.
Grande promised to return to "the incredibly fearless city of Manchester" for a benefit concert to raise money for the bombing victims and their families.