“By a court verdict, the girl was sentenced to three years of suspended liberty with a probationary period of three years and the imposition of certain duties,” the statement on the website of the regional prosecutor’s office says.

According to the investigation, because of the boy's noisy behavior, the defendant inflicted nine stab wounds on him.

Earlier, State Duma deputy Vitaly Milonov proposed introducing a preventive course on student safety in schools.