It was shortly after 20.30 on Friday evening that the police were alerted to an address in Björklinge in Uppsala. At the scene, a seriously injured person is taken to hospital by ambulance, but the person's life could not be saved.
"The person who is suspected of having participated in the brawl with the target owner comes to the police patrols and is arrested," writes the police.
A preliminary investigation into the murder has been initiated and the police will hear witnesses and safe tracks in the area during the evening.
"The police do not provide any other details about the incident at this time," the police write on their website.