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
Flowers laid in Manchester and at embassies in Europe
Image source, PATributes left outside St Ann's Church in Manchester
Image source, Getty ImagesThere were flowers outside the British embassy in Kiev, Ukraine
Image source, Getty ImagesAnd at the British embassy in Berlin, Germany
The Vatican has said in a telegram that Pope Francis is "deeply saddened" by the attack.
"His Holiness Pope Francis was deeply saddened to learn of the injury and tragic loss of life caused by the barbaric attack in Manchester," the telegram said.
"He expresses his heartfelt solidarity with all those affected by this senseless act of violence.
"He commends the generous efforts of the emergency and security personnel, and offers the assurance of his prayers for the injured, and for all who have died."
It goes on: "Mindful in a particular way of those children and young people who have lost their lives, and of their grieving families, Pope Francis invokes God's blessings of peace, healing and strength upon the nation."
Image source, Getty ImagesThe boxer from Bolton, Greater Manchester says his "heart goes out to the families of people who lost their lives" in last night's attack.
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Theresa May and Amber Rudd, the home secretary, have arrived at Greater Manchester Police's HQ.
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Nick Yates, a graphic designer from Manchester, witnessed the moment a man sought in connection with the bomb attack was arrested by plain clothes police officers in south Manchester.
The 27-year-old said he was leaving the Morrison's shopping centre in Chorlton when he saw the police.
"There was a black Mercedes van pulled up on the side of the road with six to eight police officers, all in plain clothes but wearing black caps with checkerboard marking.
"Then as I crossed the road I saw a guy in handcuffs, sat on the floor against the wall."
Image source, @yatesnick/PAPolice say they have executed search warrants in Whalley Range and Fallowfield in Greater Manchester as part of the investigation into last night’s attack.
Quote MessagePolice have executed warrants, one in Whalley Range, and one in Fallowfield, where a controlled explosion took place, as part of the investigation into last night’s horrific attack at the Manchester arena."
Spokeswoman for Greater Manchester Police
This picture was taken of the 23-year-old man arrested earlier today in connection with the Manchester bomb attack.
Image source, Mark WorswickHere is the Evening Standard's political cartoonist Christian Adams' response to the attack in Manchester.
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BBC Radio 5 live
Phil describes how he and his family helped an injured 14-year-old victim and reunited her with her family.
Phil from Bradford went to pick up his daughter and granddaughter from the Manchester Arena.
He told 5 live Daily: “She was so brave this young girl.
“She managed to tell me what her home phone number was and I rang her mum so I could, and her mum was in bits on the other end of the phone, but I said: ‘Look your daughter’s here, she’s been injured but she’s okay and we’re going to stay with her.’"
Eyewitness Phil on how he helped an injured 14-year-old victim reunite with her father.
Twelve children under the age of 16 were among the 59 casualties taken to hospital after the terror attack at Manchester Arena, says medical director of North West Ambulance Service David Ratcliffe.
As family and friends make online appeals to find loved ones using the hashtag #MissingInManchester, some images circulating online have been identified as fakes.
BBC Trending has been keeping track of which tweets are not genuine.
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Eight-year-old Saffie Rose Roussos from Leyland was killed in the Manchester suicide attack, Lancashire County Council has said.
Chris Upton, headteacher at Tarleton Community Primary School, said: "News of Saffie's death in this appalling attack has come as a tremendous shock to all of us and I would like to send our deepest condolences to all of her family and friends.
"The thought that anyone could go out to a concert and not come home is heartbreaking.
"Saffie was simply a beautiful little girl in every aspect of the word.
"She was loved by everyone and her warmth and kindness will be remembered fondly. Saffie was quiet and unassuming with a creative flair.
"Our focus is now on helping pupils and staff cope with this shocking news and we have called in specialist support from Lancashire County Council to help us do that.
"We are a tight-knit school and wider community and will give each other the support that we need at this difficult time."
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BBC News home affairs correspondent tweets...
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Guardian journalist Nazia Parveen tweets...
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In a statement, Take That said: "Out of respect to all of the people and their families that were affected by the horrific incident last night at the Manchester Arena, we have decided to postpone our show tonight in Liverpool.
"Our thoughts and prayers are with you all."
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Simple Minds have confirmed their show this evening at Bridgewater Hall in Manchester will go ahead despite last night's bomb attack on the Manchester Arena.
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In a Facebook post, external, the band said:
Quote MessageThe team at The Bridgewater Hall are aware of the heightened level of threat against venues across the country.
Quote MessageThis evening’s performance featuring Simple Minds will proceed as planned... Patrons should plan for addition travel time to attend the performance and to allow for additional security checks."
The band added: "Our thoughts and prayers go out to the families and friends of anyone associated with the Manchester Arena incident."
Danny Shaw, home affairs correspondent, says...
Danny Shaw
BBC Home Affairs Correspondent
It is understood the attacker is either British or from Britain, although this has not been confirmed from official sources.
More arrests and raids are expected to follow the arrest of a 23-year-old man in south Manchester.