Olivia Campbell, 15, among Manchester attack victims

Teenager Olivia Campbell has been named as one of the victims of Monday's suicide attack in Manchester.

The 15-year-old's mother Charlotte paid tribute to her daughter on Facebook.

"RIP my darling precious gorgeous girl Olivia Campbell taken far far too soon - go sing with the angels and keep smiling mummy loves you so much."

Mothers Alison Howe and Lisa Lees were both killed as they waited for their children to come out of the concert.

Mrs Howe's step-son Jordan said on Facebook: "They took a caring beautiful mum and step mother away from us all she was amazing to us all x love you loads Alison Howe xx".

Lisa Lees's brother Lee Hunter said: "For those who don't know Lisa is gone but never ever forgotten I love you Lisa I'll miss you so much".

Kelly Brewster, who was also killed in the attack, was at the concert with her sister.

Her partner said on Facebook: "Kelly really was the happiest she has ever been and we had so many things planned together. My daughter Phoebe will be absolutely devastated like we all are. Love you loads."

Saffie Rose Roussos, aged eight, was also named as one of the victims in the terror attack.

The Ariana Grande fan has been described as "simply a beautiful little girl who was loved by everyone".

She was a pupil at Tarleton Community Primary School, and had been attending the concert with her mother and her older sister.

Her headteacher, Chris Upton, said her death had come as a "tremendous shock" and he described Saffie as "simply a beautiful little girl".

He added: "The thought that anyone could go out to a concert and not come home is heartbreaking.

"She was loved by everyone and her warmth and kindness will be remembered fondly. Saffie was quiet and unassuming with a creative flair."

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Georgina Callander also died in the attack, which happened at the end of the gig.

The 18-year-old had posed for pictures with the American singer in the past, and she was studying health and social care at Runshaw College in Lancashire.

A day before the concert, she had tweeted Grande and said: "SO EXCITED TO SEE U TOMORROW."

The college said: "Our deepest sympathies, thoughts and prayers go out to all of Georgina's family, friends, and all of those affected by this loss.

"We are offering all available support possible at this tragic time, including counselling with our dedicated student support team."

John Atkinson was also killed. The 26-year-old from Bury has been described as a "beautiful soul" by loved ones.

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The bomb suspect has been named by police as 22-year-old Salman Abedi.

Islamic State has claimed one of its members carried out the terror attack at the sold-out concert, which was attended by thousands of young people.

Greater Manchester Police said a lone male attacker detonated an improvised explosive device in the suicide bombing.

Many of the 59 people injured are being treated for life-threatening conditions.

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Patients have been taken to eight hospitals across Manchester - and 12 people under the age of 16 are being treated at Manchester Children's Hospital.

Investigators are trying to establish whether the attacker was part of a wider network.

A 23-year-old man in south Manchester has been arrested in connection with the bombing. According to witnesses, he was apprehended by police as he walked along a street.

Investigators have also performed a controlled explosion at an address in Fallowfield.

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:: A hotline has been set up for those with concerns over loved ones who remain unaccounted for. Those worried about their friends or family should call 0800 096 0095.