Hundreds marched in the Croatian capital on Monday following a knife attack at a school in Zagreb that resulted in the death of a seven-year-old girl and injuries to three other children. The protest, organized by teachers’ unions, called for increased safety measures in schools. The Croatian Ministry of Education is exploring ways to enhance school security, with potential measures including locking school doors. The suspect, a 19-year-old former student, has been identified as the assailant.