Hear gym owner Robin Fogelqvist talk about when the shots went through the wall - in the clip
Robin Fogelqvist had dreamed of opening his own gym for over ten years.
On Sunday evening, an opening weekend was summed up with over 500 guests.
That was when a fatal shooting took place in the room next to the gym - and several shots went through the wall straight into the gym where Robin Fogelqvist was sitting with about 20 people.
Special event
Police on Monday arrested a person suspected of involvement in the murder.
According to the police, it is a man in his 35s who was shot to death and the police have agreed early on that both victims and suspects belong in the criminal gang environment.
- The people we are interested in have threaded connections, says police spokesperson Anna Göransson.
During the night of the murder, the police started a special event to make it easier to gather resources.
On Monday, interrogations, house searches and mobile phones were seized.
No one has yet been arrested on suspicion of murder.