Police were called to the scene shortly before 5pm after concerned neighbours reported hearing arguments and fighting in a building in the Hagalund district of the north Stockholm suburb.
When police arrived at the scene they found the body of the victim, who had been shot in the face. He had not yet been identified late on Friday evening.
The 43-year-old suspect was arrested for murder shortly after the shooting.
“He’s sobering up in a holding cell at the moment. He was intoxicated when the crime took place,” said police sergeant Mats Sundberg on Friday evening.
Police have not yet established a motive for the killing.
”We think they knew each other since they stood arguing in an apartment first,” police inspector Tomas Borr told newspaper Aftonbladet.