It was on Friday afternoon that the police and ambulance were alerted to Trosa, where the teenage girl is said to have injured a boy of the same age with a knife. The boy suffered a wound in the neck and was taken by ambulance to hospital. According to the police spokesperson, the boy was awake and talkable at the time.

The girl, who is under 18 years old, was arrested by police in Vagnhärad shortly after the incident, but was released on Sunday.

- The on-call prosecutor said that there was no risk that she would complicate the investigation, says prosecutor Rahima Ortac, who also points out that it takes more to keep a young person detained than an older one.

A technical investigation of an area at Tomtaklint in Trosa was carried out on Friday.