A 17-year-old boy who opened fire in his Nashville high school's cafeteria fired a total of 10 shots from a 9 mm pistol within 17 seconds of entering the room.

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.

Authorities are examining “very concerning online writings and social media posts” connected to the shooter who killed a female student and wounded another student in a Nashville high school cafeteria.