The man is believed to have died as a result of stab wounds.
"Two guys had a discussion on social media, and then it escalated somehow," prosecutor Sonja Seligmann told the newspaper.
According to Seligmann, there were between ten and fifteen people at the scene at the time of the incident.
You could say that it is no coincidence that those two groups were there at that time, she says.
Another person was taken to hospital after the incident. Four people have been arrested after the incident on suspicion of murder and attempted murder.
