March 31, 18.33, Other, Knivsta

The police are on the scene in central Knivsta after the public found what is suspected to be blood in a stairwell.

The police are working to investigate whether a crime has been committed and are taking investigative measures on the scene, including door-to-door questioning in the area.

No injured person has been found.

It is currently unclear how the possible blood ended up on the scene.

The police are urging people who may have seen or heard anything unusual in the area to contact the police.

There is currently nothing that suggests there is any danger to the public.