A 52-year-old female elementary school teacher in Gimhae, South Gyeongsang Province, was found dead Monday in a classroom in an apparent suicide, according to the police.
The Gimhae Police Station said a fellow teacher found her hanging from a scarf in the classroom at around 6 p.m.
The fellow teacher told the police that she went to check on the teacher since she did not call it a day even after classes had ended.
The fellow teacher said the deceased teacher had fought with the school principal earlier over her performance scores before she was found dead.
Police suspect that the teacher took her own life as she was disappointed with the lower-than-expected evaluation scores given by the principal, which are crucial for promotion to a vice principal post.
Police officers said the teacher left a suicide note and there was no sign of external injuries to her body. They said that she had wanted to become a vice principal and killed herself out of despair after the principal refused to give her high performance grades.
The police are still looking into the case to confirm the cause of her suicide.