Even uncredible threats can however constitute a crime and the incident will therefore be investigated.
The police have not closed or evacuated any schools, but some schools have made their own decisions to cancel teaching for the day.
Threats have been made to several schools in Stockholm today. We have chosen to cancel teaching while it is being investigated, says a principal of a high school who Aftonbladet has spoken to.
It is unclear how many schools have received the threat and it is not something the police want to comment on at present, with reference to the preliminary investigation which is covered by secrecy.
