Nabarangpur: In a tragic incident, a physical education teacher was killed and twenty students were injured when the bus they were travelling turned turtle. The incident has happened today morning on the Chandahandi Ghati in Nabarangpur district. According to sources, the students belonging to various schools of Umerkote along with the teacher were going to attend the Chandahandi Sports program. The deceased teacher belongs to Swami Vivekananda High School. More details awaited.