At 00.37, the police were alerted to Stora torget in Uppsala. A man in his 20s had been stabbed in the chest, not far from the heart.

He has been taken by ambulance to hospital. His injuries are not considered life-threatening. A preliminary investigation into attempted murder has begun.

- The man has stated that he was stabbed by three unknown perpetrators. But we have no suspects, says police RLC officer Joel Manner.

Do you know what the quarrel was about?

- No, I do not know.