The man was found dead in a home on Monday, the Prosecution Authority said in a press release. The woman is suspected on probable grounds, the higher level of suspicion.
"The investigation is at an early stage, and the police are now working to establish what happened through interviews and forensic examinations," Public Prosecutor Malin Thörnvall Hillbom said in the press release.
By noon on Thursday, the prosecutor must decide whether the woman should be remanded in custody or released.
