Police discovered the body of Erika Eriksson on Sunday morning in an apartment located in Spånga west of Stockholm.
A 33-year-old man from Sandviken in eastern Sweden who was in the apartment when police arrived has been detained on suspicions of murder.
The night before, Eriksson, a native of Arvika in central Sweden, had been celebrating her 28th birthday with friends.
She had moved into the sublet apartment a week earlier in order to look for work in the Stockholm area.
Most of the friends celebrating with Eriksson last Saturday night knew each other through their common interest in World of Warcraft.
“We understand that several of those who were there had the World of Warcraft computer game as a common interest,” prosecutor Christina Voigt told the Nya Wermlands-Tidningen (NWT) newspaper.
Speaking with the Metro newspaper, Voigt added that the game and how it may have figured in the killing is now an important part of the investigation.
“We know there are connections and it’s something we’re looking into,” she told Metro.
Police confirm that the suspect and the victim were acquainted, but refuse to elaborate on the duration or nature of the relationship or on the cause of death.
“They knew each other, but we’re not going to get into how or why she was killed,” said police spokesperson Mats Eriksson to Metro.
But an acquaintance of Eriksson confirmed for NWT that she and the 33-year-old knew one another and that they met recently as a result of playing World of Warcraft.
Initial reports indicated Eriksson had been strangled, but police refuse to confirm the exact cause of death, the Arbetarbladet newspaper reports.
The suspect is set to be interrogated further on Tuesday, at which time prosecutors will decide whether to seek a remand order against him.