A knife attack at an elementary school in Zagreb, Croatia, has resulted in the death of a seven-year-old girl and left eight others injured, including a teacher who is now in critical condition, CNN reported. The attacker, a 19-year-old believed to be a former student of Precko Elementary School, entered a first-grade classroom early Friday morning and began his assault with a knife.

The attack left a teacher with life-threatening injuries, and the injured students are being treated in hospitals across the city. Authorities confirmed that the teacher's condition remains critical. "The attacker is under police custody. The injured persons are receiving medical treatment," Zagreb police said, as per CNN.