A man in southern Stockholm was taken to hospital with a stab wound in his arm on Saturday afternoon.
The injured party was reached through a chat program that SL has for accidents on the trains, it was not reported to the police, says police spokesperson Ola Österling.
Instead, the man was found through door-to-door inquiries. Another person was in the company, but did not get injured.
The police have, among other things, searched with a dog, but the search for a perpetrator has subsided. The crime classification is aggravated assault.
We have a very hard time moving forward with this, says Österling.
The police currently have no information about where the incident is supposed to have taken place. Expressen reports that it is supposed to have occurred on board a subway train, with reference to SL's press department. Initially, Björkhagen's subway station was blocked off.