It was at lunchtime on Friday that the police and ambulance were called to the district.
There they found a badly stabbed man whose injuries were so serious that he later died.
Later that day, three suspects were arrested and during Tuesday morning all were in custody.
- The police have made an intensive reconnaissance and investigation effort.
This has led to the conclusion that the state of evidence is good, says chamber prosecutor Viktor Törneke.
Unclear motive
Two have been detained on probable cause on suspicion of murder.
A third has been detained on probable cause on suspicion of aggravated protection of a criminal.
Otherwise, Viktor Törneke does not want to say much about the incident.
He does not want to say what the crime is believed to be about.
- We have a few different reports we are looking at, but I don't want to comment on a possible motive.
At least one of the suspects is already known for violent crime.
The prosecutor does not want to say whether there are suspected gang connections.