Swedish police say five people have been shot in an attack at a school in the city of Orebro 200km west of Stockholm, triggering a massive response by rescue services.
"Five persons are confirmed shot," police said in a statement.
"This is currently seen as attempted murder, arson and aggravated weapons offence."
Ambulances, rescue services and police are onsite, a spokesperson for local rescue services said.
A police spokesperson declined to comment further when reached by Reuters.