The 32-year-old is also suspected of preparing for a terrorist crime through preparation for murder.
At present, there is no further suspect in the murder of Ing-Marie Wieselgren in Visby during Almedalen Week.
The security police are now taking over the investigation of the murder during Almedalen Week in Visby.
The case is now classified as a terrorist crime, Säpo tells TT.
The text is updated.