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At about 10:33 p.m. Monday, near the end of an Ariana Grande concert, a man detonatd detonated an improvised explosive device near the ticket office outside Manchester Arena, killing 22 people and hospitalizing 59.
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'Everyone Began Screaming'
Eyewitness Andy Holy told the BBC that he was blown through a door at the arena, noting that the “whole building shook."
Esme Findlay, who was inside the arena at the time, told PEOPLE that "everyone began screaming immediately and pushing to get out" after the explosion.
“No one knew if it was a bomb or what it was, but people were screaming ‘bomb, bomb,’ and there was a lot of panic," she said.
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Homeless Man is Good Samaritan
Chris Parker, 33, a homeless man who came to Manchester Arena to panhandle, came to the aid of dozens of injured people, running toward the explosion despite the risk to his own safety.
“Just because I am homeless doesn’t mean I haven’t got a heart, or I’m not human still,” he told ITV News. “I’d like to think someone would come and help me if I needed the help.”
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Queen Elizabeth Visits Children's Hospital
On Thursday, Queen Elizabeth paid a surprise visit to Royal Manchester Children's Hospital to visit with injured victims.
Queen Elizabeth told 14-year-old Evie Mills, who received the concert tickets a birthday present, and her parents, “It’s dreadful. Very wicked. To target that sort of thing."
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Tribute at St. Ann's Square
During a tributes at St. Ann's Square, one woman began singing Oasis’ popular track “Don’t Look Back in Anger.” Soon, the rest of the crowd joined in, with many wiping tears from their eyes.
In an interview with PEOPLE, Lydia Bernsmeier-Rullow, the woman who kicked off the musical tribute, said, "It was beautiful, I got goosebumps."
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Tributes to Victims
In the days following the attack, Manchester residents paid tributes to the victims. Through the police department, families of victims released photos and statements honoring their loved ones.
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Officials Urge Unity: 'Do Not Tolerate Hate'
Chief Constable Ian Hopkins said it was important that Manchester stay united during a difficult time.
“Now, more than ever, it is vital that our diverse communities in Greater Manchester stand together and do not tolerate hate,” he said.
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Ariana Grande 'Absolutely Crushed' About Victims
After the attack, a source told PEOPLE that the 23-year-old Grammy nominee is "traumatized," and on Thursday, the source said she had barely slept all week.
"Right now, her main ... focus is on the victims and how she can help," the Grande source told PEOPLE. "It's less about her and her own state, and it's more about them. She's alive, she's safe. This isn't about her -- it's about the victims."
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Police: Suicide Bomber Was Part of a Network
Police said Salman Abedi was part of a larger terrorist network and that he didn't act alone.
By Friday, police had arrested a total of 10 people in the U.K., but released two of them, according to the BBC. Police said they believed they had "got hold of a large part" of the network Abedi had been a part of.
Amid stepped-up security at events, Rowley encouraged the public to "go out as planned and enjoy yourselves."