"She had fainted after getting hit in the neck of the public sea and waking up by one of the guards pulling and tearing her and pushing her against a wall," says mother Eva Espinoza, who reported the incident to the police.
A video shows how a security guard punches a boy in the chest. Artist David "Snow White" was upset when he saw what was happening. Mobile films show how he interrupts the song and starts calling the guard.
Nearly 600 people, many children, were in the audience at Saturday's concert.
- We are trying to find out what has happened. We have a dialogue with the guards and will meet the artist's manager on Thursday, says Fredrik Jönsson, operations manager at the Dairy.
At least two police reports have been made. They apply to the girl who got bruises and the blow that is directed at the boy. The security company hired by the Dairy does not want to comment on the events, but refers to the police investigation.