A knife-wielding teenager walked into a school in Croatia’s capital Zagreb on Friday, killing a 7-year-old student and injuring three more children and a teacher, authorities said. The attack took place around 9:50 a.m. on the last day of school before Christmas at the Precko Elementary School in the Zagreb neighborhood of the same name. It caters for children between the ages of 7 and 15.

Croatia’s president declares Saturday day of mourning following school knife attack

A knife-wielding teenager walked into a school in Croatia’s capital Zagreb on Friday, killing a 7-year-old student and injuring three more children and a teacher, authorities said. The attack took place around 9:50 a.m. on the last day of school before Christmas at the Precko Elementary School in the Zagreb neighborhood of the same name. It caters for children between the ages of 7 and 15.