It was around 20:00 on Tuesday evening that the incident occurred when three masked men armed with a knife and gun-like objects entered the store.
Both staff and customers were inside the store.
- According to initial information, a person must have suffered stab or cut injuries.
They may have been shot.
Whether it is with a sharp weapon or not, we have to investigate, says Rickard Lundqvist, press spokesperson at the police.
A large number of patrols are on site to investigate the incident.
They are also looking for the perpetrators, who are said to have been dressed in skull costumes.
They must have fled running in the direction of the sports ground.
- We are very early in the case and there is a lot of information to be collected, says Rickard Lundqvist.