Gyeryong: Police on Tuesday applied for an arrest warrant against a high school senior detained on charges of attacking a teacher with a knife at a school in the central city of Gyeryong the previous day.

According to Yonhap News Agency, the student, whose identity has been withheld, is accused of stabbing the 30-something male teacher with a knife multiple times at their school in Gyeryong, about 165 kilometers south of Seoul, at 8:44 a.m. Monday. The student immediately fled the scene but later turned himself in to the police.

The teacher sustained non-life-threatening injuries to the jaw and shoulders and underwent surgery. The police suspect that the student planned the attack in advance due to resentment, as he had middle school conflicts with the teacher, who was recently reassigned to his high school.

The student is said to have complained that the teacher was particularly harsh on him during middle school and refused to attend school.