Witnesses described seeing maimed bodies and blood on the floor, which was littered with nuts and bolts packed into the bomb.
Witnesses described seeing maimed bodies and blood on the floor, which was littered with nuts and bolts packed into the bomb that detonated in a covered area just outside one of the exits from the Manchester Arena.
Police, family and friends have now named all of those killed at pop star Grande's concert.
Eight-year-old Saffie Rose Roussos from Leyland in Lancashire, northwest England, is the youngest victim.
She attended the concert with her mother and older sister. Friends said they were both being treated in hospital.
Chris Upton, headteacher at the Tarleton Community Primary School, said her death was a "tremendous shock".
"She was loved by everyone and her warmth and kindness will be remembered fondly. Saffie was quiet and unassuming with a creative flair," he said.
Public relations manager Martyn Hett, 29, from Stockport near Manchester, had appeared on television shows like "Come Dine With Me" and "Tattoo Fixers".
His brother Dan confirmed his death on Twitter saying: "We are heartbroken".
"Martyn was the icon of all our lives. His infectious laugh and his niche sense of humour will stay with us forever."
Russell Hayward, reported by British media to be Hett's boyfriend, said: "Our wonderful, iconic and beautiful Martyn didn't survive.
"He left this world exactly how he lived: centre of attention."
Chloe Rutherford, 17, and Liam Curry, 19, from South Shields in northeast England, were inseparable, their grieving families said.
"They lived to go to new places together and explore different cities. They wanted to be together forever and now they are," they said in a statement.
"They were perfect in every way for each other and were meant to be".
On the night they died "their wings were ready but our hearts were not," they said.
Olivia Campbell, 15, had been enjoying the concert with her friend Adam. He survived and was being treated in hospital.
"Please stay together, don't let this beat any of us, please. Don't let my daughter be a victim," her mother Charlotte said at a vigil in Bury, a town near Manchester.
"This is such a hard time for us, I had to come, I didn't know what to do, I don't know where to be, I don't know what to do," she said.
32-year-old Kelly Brewster, from Sheffield, died while attending the concert with her niece, who survived.
Uncle Paul Dryhurst said Brewster had "heroically shielded" her sister and 11-year-old relative from the blast.
Polish couple Angelika and Marcin Klis had come to get their daughters, who were unharmed in the blast, when they were killed.
A fundraising page to support the orphaned children had raised £12,000 by Thursday.
Off-duty police officer Elaine McIver was at the concert with partner Paul, who was seriously wounded in the attack, according to a family statement.
"She would want us all to carry on regardless and not be frightened by fear tactics: instead she regularly urged us all to rise up against it," said her family.
The other victims are teenagers Georgina Callander, 18; Eilidh MacLeod, 14; Nell Jones, 14; Sorrell Leczkowski, 14; Megan Hurley; and Courtney Boyle, 19
The adults named are: Michelle Kiss; Alison Howe, 45; Lisa Lees, 47; John Atkinson, 26; Philip Tron, 32; Wendy Fawell, 50; and Jane Tweddle-Taylor, 51