At 21 o'clock on Monday evening, police were alerted to an apartment riot in Knivsta. Once in the scene, three people were found, of whom two - a woman in her 50s and a man in her 40s - were arrested for abuse. When the latter were arrested by prosecutors, the crime classification was written down to serious abuse after information that an "ax-like object" was used.

- They should not have been so injured that they had to go to hospital, says Jonas Eronen.

Both persons must have used the same sharp attitude from the report to judge, but it has not yet been known how.

"It's a messy case," he says.

The third person is not suspected of a crime but is considered a witness.