Intelligence sharing between the UK and the US resumes after row
Police search a property in Wigan following an assessment by a bomb disposal team
Police say they have made "significant" arrests - eight people are still in custody
Raids on properties have yielded "very important" items, police say
The Queen has visited victims at Royal Manchester Children's Hospital
A national minute's silence has been held to remember victims
Suspected suicide bomber is UK-born Salman Abedi, 22, of Libyan origin
Today Programme
BBC Radio 4
Mona Mohamed, head of Manchester Islamic High School for Girls, on recent attack
"When are you going to stop bombing people?"
What someone shouted at a 14-year old Muslim girl in Manchester, her headteacher tells the Today programme.
BBC Radio 5 live
Greater Manchester deputy mayor Beverley Hughes says the threat level has been raised because the perpetrator of the attack "might be part of a wider network" and there is the possibility of a further attack.
Police and security services are "active in the pursuit of intelligence" and have successfully foiled other planned attacks, adds Baroness Hughes, who was appointed by mayor Andy Burnham to take the lead on policing.
"If there's anything positive in this, it's that spirit of solidarity" seen in Manchester since the attack, she says.
It is important to "not let this type of atrocity fracture the city", she adds.
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BBC Radio 5 live
Mancunian James says the city will “stick together and show solidarity” following the terrorist attack on Manchester Arena, which left 22 dead.
James says the city will show solidarity after Manchester Arena terror attack.
Lizzie Murtagh and her 12-year old daughter Olivia left Manchester Royal Infirmary this morning after being treated for shrapnel wounds.
Lizzie said: "I didn't really feel anything hit me at first, I just grabbed Olivia as there were people bleeding, people on the floor.
"I had to jump over a lady, everyone was screaming. I started screaming 'oh my God, oh my God' as I was dragging Olivia out of there because I knew what it was.
"But I was panicking in case another one went off.
"Olivia was bleeding and my leg was bleeding quite bad, but we didn't really know we'd been hit until we were in the taxi because it ripped through our clothes.
"The hospital said it was the nuts and bolts and debris off the bomb. That's how close we were. We were the lucky ones.
"Today I can feel the pain, it's really, really sore. I'm all bruised and there's a hole in the back of my leg."
BBC Radio 5 live
A Manchester based tattooist has designed a bee tattoo to raise money for the families of victims of the Manchester Arena terror attack.
Sam Barber has had support from tattoo studios across Manchester, and as far away as Australia.
Sam is offering to tattoo the bee, which has long been the symbol of the city, for a £50 donation.
Sam is offering to tattoo the ‘Manchester Bee’ for a donation of £50.
The home secretary adds that it was "irritating" that details about the investigation were leaked abroad.
Some information on the case has flowed from the US.
She says she has been "clear with our friends" that leaks should not happen again.
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Erinn Kerr
BBC News NI
More often than not the papers in Northern Ireland have different stories on their front pages.
They cater to different audiences and sometimes take conflicting editorial and political stances when reporting the same events.
Image source, PABut today is one of those rare days in which they stand, like the rest of the UK, united in sympathy for the families of the children and young people killed in the Manchester attack.
BBC Breakfast
"It was our darkest hour but also you saw the best of Greater Manchester yesterday," says mayor Andy Burnham.
He tells BBC Breakfast there should be "a great deal of pride" that people pulled together.
In response to the increased terror threat level, people won't necessarily see the military in Manchester but will see an increased police presence.
People should not be unduly alarmed, he says, "as much as possible, we want to return to normality".
The newly-elected Greater Manchester mayor says: "People want Manchester to get on with the job and we will."
Of the suspect, he says: "The individual who committed this unspeakable act of evil was a terrorist, not a Muslim."
Twenty people remain in "critical care" across Manchester with people suffering from "horrific injuries" including major organ damage and potential loss of limbs, Jon Rouse of the Greater Manchester Health and Social Care Partnership has said.
Today Programme
BBC Radio 4
The bomber, Salman Abedi, was known to security services before the attack, Home Secretary Amber Rudd tells the BBC.
And she says it seems likely he was not acting alone.
Eleanor Garnier
Political Correspondent
The prime minister will chair another meeting of the emergency committee, Cobra, this morning, Eleanor Garnier says.
It was after last night's meeting, she says, that Theresa May revealed intelligence officials had decided to raise the terror threat level to critical.
That means the military will be helping the police to protect the public at key events across the country.
As for the general election, she says, the aftermath of the attack is happening right in the middle of campaigning.
But that campaign is been suspended by all parties, while the government deals with the fallout from the attack.
The Met outlines how policing will change in London from today:
People will see more armed officers, both on foot and in vehicles.
They will also be out in support of Project Servator - which uses teams of specialist police officers who have been trained to spot the tell-tale signs that a person may be carrying out "hostile reconnaissance or committing other crime".
The approach is based on extensive research into the psychology of criminals and what undermines their activities.
Meanwhile, the military will provide extra support at key locations such as Buckingham Palace, Downing Street, embassies and the Palace of Westminster.
That will free up armed officers to carry out patrols.
Commander Jane Connors, who is leading the London policing operation, says:
Quote Message"We will do all we can to protect the capital that we serve at this unsettling time. The reality is that we must be prepared to be able to respond to and deal with armed and deadly attackers, so we must be in a position to respond with firearms officers who will use force to stop those attackers in their aim.
BBC Radio 5 live
Manchester attack: Poet's defiant words for crowds at the vigil
Manchester poet Tony Walsh - also known as Longfella - read his poem "This is the Place" during Tuesday's vigil.
He tells 5 Live that he hoped his poem could speak for the city - "I hoped it would strike a chord."
He adds that, when the time came to read the poem, he felt "strangely calm".
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Community organiser Furquan Naeem says he went to the same inner-city high school as the bomber, Salman Abedi.
He describes how it was a "mixed, diverse south Manchester community" and says there is "shock and dismay" that there was this person "among us".
He says:
Quote MessageThe Muslim community now feels we have to do something and stand up. We are ready to work with the authorities to build trust. And to drive out these people from our communities because they are not representative of the Muslim community here in Manchester."
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Today Programme
BBC Radio 4
Jessica, daughter of Joy Division and New Order's Peter Hook, was at the concert on Monday night. She described a scene of "absolute carnage".
But Peter Hook says the people of Manchester are "very resilient" and that "nothing will keep them down".
BBC Monitoring
News from around the globe
The Manchester attack features prominently on the front pages of newspapers throughout Europe.
Several papers carry graphic images of the aftermath of the suicide bombing as well as pictures of the alleged attacker, Salman Abedi.
The French daily, Le Monde, says: "Faced with terrorism, Manchester displays its spirit of resistance".
"Britain fears further attack,” says Germany's Frankfurter Allgemeine. Several focus on what is known about the attacker, "the student killer".
Image source, BBC Monitoring