An outpouring of grief has gripped the British city of Manchester following the terror attack at an Ariana Grande concert that killed at least 22 and injured 59 others. Many of the victims are feared to be teenagers or even younger children.

from the bottom of my heart, i am so so sorry. i don't have words.

— Ariana Grande (@ArianaGrande) May 23, 2017

The attack set off pandemonium at the 21,000-seat Manchester Arena at about 10:30 p.m., just as hordes of concertgoers were starting to leave the stadium. North West England Ambulance Service Medical Director told SkyNews that 12 seriously injured children were taken to one hospital after the attack.

One last time 😥

— ♡♡ (@hannawwh) May 23, 2017

Here is a look at victims identified so far as among the confirmed fatalities:

Georgina Callander, 18

Runshaw College said in a post on Facebook that one of the victims, 18-year-old Georgina Callander, was a student at the sixth-form college in Leyland.

Callander, in her second year at Runshaw, was studying health and social care. “Our deepest sympathies, thoughts and prayers go out to all of Georgina’s friends, family, and all of those affected by this loss,” the school said.

Instagram Photo

Callander had celebrated her birthday just seven weeks ago, according to a photograph she posted on Instagram that showed her delight in feeding a giraffe at the ZSL London Zoo.

“i had such a good birthday i got to feed these cuties and some sea lions!” she wrote, “i had such a good day with my friends and mum im super super happy 🎈🐥🎉

Instagram Photo

A classmate, Sophie Marsh, posted a tribute message on Instagram saying her friend had been excited to attend the Grande concert for some time.

“I watched you leave yesterday to go and see a concert that you had been looking forward to for ages, and now I don’t know what to do but cry,” Marsh wrote. “Never stop smiling love 💛 I’ll always miss you”

Callander was a huge fan of Grande, whom she met in 2015—posting photos of the encounter on social media. “I HUGGED HER SO TIGHT AND SHE SAID SHE LOVED MY BOW I CANT GET OVER THIS I NEVER WILL,” she wrote then.

18-year-old Georgina Callander, a Manchester victim, posted a photo with her idol @ArianaGrande in 2015.

— Beth Ponsot (@bponsot) May 23, 2017

Callander tweeted at the American pop star on Monday before the show: “SO EXCITED TO SEE U TOMORROW”.

Saffie Rose Roussos, 8

Another victim, 8-year-old Saffie Rose Roussos was also killed in the attack, the Guardian reported. Roussos went to the concert with her mother and sister, both of whom are in the hospital.

The young girl was a student at Tarleton Community, a primary school near Preston, Lancashire.

Sad news. Eight year old Saffie Rose Roussos, a pupil at Tarleton Primary, was killed in the #ManchesterBombing – school paying tribute.

— BBC Lancashire (@BBCLancashire) May 23, 2017

Headteacher Chris Upton told the Guardian that Roussos was “loved by everyone and her warmth and kindness will be remembered fondly.”

“The thought that anyone could go out to a concert and not come home is heartbreaking,” he said.

John Atkinson, 26

Three victims of the Manchester attack have been named so far, the latest being 26-year-old John Atkinson from Bury

— BBC News England (@BBCEngland) May 23, 2017

A 26-year-old man, John Atkinson, from the town of Bury in Greater Manchester was also a victim of the bombing, the BBC reported.

As news of his death emerged, friends posted tributes on social media: “Heartbroken for the Atkinson family at this Sad time never would I imagine this happening so close to home..💔💔💔 Rest in paradise John you beautiful soul.. 🙏🏾

This story will be updated as more information becomes available.