The memorial ceremony was held at Dalen's leisure center in southern Stockholm, where Nils "Einár" Grönberg grew up.
At the square, people gathered on Friday night to leave flowers, light candles and talk about what happened.
Mickey and Sam Brandt visited the place with dad Andreas Brandt.
- No one should die when they are so young, only 19 years old.
It's awful, says Mickey Brandt.
The initiator of the ceremony is high school teacher Carolina Gaete.
She hopes that the moment of remembrance can be both a consolation and create reflection on what happened.
- As a fellow human being and a person who works with young people with different backgrounds, I feel that we owe it to our future generations to wake up.
It is a pity that a famous person has to die for us to wake up, she says.
Great despair
The shooting occurred in the nearby area of Hammarby lake town late on Thursday night.
SVT's reporter Diamant Salihu tells in SVT's live broadcast about the despair that the residents in the area feel.
- This comes very close to many people.
This is a person that many know, look up to and listen to.
It has been difficult for parents to take this call today.