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
Manchester's Arndale shopping centre was evacuated earlier while a man was arrested.
Evacuation of Manchester Arndale shopping centre
The centre has since reopened and police say the closure is not believed to be connected to the blast at Manchester Arena.
There will also be more armed officers at Wembley and Twickenham this weekend
The Metropolitan Police Service has increased the number of officers on duty across the capital.
In a statement, the Met said specialist officers were reviewing all the plans for upcoming events in London.
This includes smaller events which may not have had a police presence seeing a greater focus.
The Met also said a full review of the security and policing operations for the weekend's sporting events - at both Wembley and Twickenham - is underway.
This will include the deployment of extra armed officers.
The World at One
BBC Radio 4
The lead singer of Elbow, has said the attack at Manchester Arena is "a hugely disturbing thing".
Guy Garvey told Martha Kearney about his connection to the arena which he described as "part of the heart of the city".
"It's so sad that somebody can do that," he said. He added: "The people who will be the most afraid because of what he did... will be real Muslims, members of the real faith who don't believe in violence."
More than £250,000 has already been raised to support families of victims of Manchester Arena attack.
Image source, JustGivingThe crowdfunding page, with a target of £300,000, was set up this morning by the Manchester Evening News.
French president Emmanuel Macron signs a condolence book for the victims of the Manchester attack at the British Embassy in Paris.
Image source, EPATonight's live shows at three Manchester venues - Albert Hall, the Deaf Institute and Gorilla - will all go ahead as planned.
Organisers said in a statement: "We would like to convey our deep sadness and sympathy to all those who have been affected by the tragic events that occurred last night at Manchester Arena.
"In support of Manchester, the city leadership and the chief constable of Manchester, we can confirm that all live shows at our venues will be going ahead tonight as planned."
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Mrs May is in Manchester
The prime minister is in Manchester this afternoon.
She said: "This has been an absolutely horrific attack.
"I've been here today talking to the police about the investigation that is continuing. They are working to identify whether there was a wider group of people involved in this incident.
"To cut off young lives in this way - it is devastating."
Mrs May went on to praise the way police had responded to the attack.
Image source, Getty ImagesManchester Cathedral tweets...
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Cards, flowers, candles and moving tributes are being laid by residents in Manchester after 22 people were killed in last night's suicide bomb attack in Manchester.
Image source, Getty Images
Image source, PA
Image source, PA
Image source, Getty ImagesGreater Manchester Police says the city will "not be defeated".
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The Prince of Wales has sent a message of condolence
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Radio 5 live presenter Sarah Brett tweets...
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BBC Wales reporter tweets...
Cemlyn Davies
Gohebydd Gwleidyddol BBC Cymru
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Jakub Krupa from the Polish Press Agency has spoken to the Polish foreign ministry...
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A taxi firm took people caught up in the attack home for free. Sameer Arshad of Street Cars said he reached out to his drivers as those who were stranded "needed us".
Taxi firm ferried people caught up in the Manchester Arena blast home to their families
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The World at One
BBC Radio 4
The mayor of the Liverpool City Region has spoken of his gratitude towards a taxi driver who found his daughters in the aftermath of the Manchester suicide attack.
Steve Rotheram told the World at One "the taxi driver...walked through the streets of Manchester to go and physically get them and take them back to the cab that he'd left some distance away".
"I'm forever grateful for that show of kindness," he added.
Richard Sheriff, the headteacher of Harrogate Grammar School, said he believes seven of his pupils were at the concert.
All of them are now safe, with some back at school today.
He said two of them - in the "11-14 age group" - are awaiting surgery this afternoon, but their injuries are not life threatening.
He said the attack was a "despicable act".
"We must not let them win," he added.