The teenager who fatally shot a student at a high school in Nashville, Tennessee, livestreamed part of the incident, according to the platform he used, and he was influenced by internet content that authorities described Thursday as “harmful and objectionable.

Students and parents described a scene of chaos, confusion, and terror during the deadly shooting at Antioch High School on Wednesday.

One 16-year-old girl named Josselin Corea Escalante was killed, and two other students were injured. The injured students were taken to Vanderbilt Pediatrics for medical attention. The shooter shot himself and died from the self-inflicted wound.