Serious incidents that threaten health and welfare are supposed to be reported to the Swedish Work Environment Authority. After an incident is reported, inspectors are sent to the school in order to tell the schools what to do to prevent the same incident from happening again. If the schools do not follow the authority's advice, then they are fined.
In 2012 the system of reporting incidents was changed, allowing reports to be submitted online. This makes it difficult for a direct comparison to the years before the change. Between 2012 and 2014 the reports of incidents involving serious threats have increased by 20 percent, and the reports of serious violence have increased by 40 percent over the same period.