At 12:30 on Thursday, an ambulance and police were called to an address in Enköping, after information was received that a person in a nursing home had killed one of the staff, the police write on their website.
At the scene, the police found a young woman dead indoors and arrested a man in his 20s on suspicion of murder.
– From the information I have, the dead woman is employed at the accommodation, says Jonas Eronen, press spokesperson for the Central Police Region.
The crime scene is cordoned off for technical examination and a series of preliminary investigation measures are taken.
More on the suspected murder in the player above.