Law enforcement officials seeking a motive for a shooting at Nashville’s Antioch High School on Wednesday morning are examining alarming social media posts and writings tied to a teenager police say shot and killed a 16-year-old girl.

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.

Get all the news you need in your inbox each morning. The shooter killed one student, Aaron said. He then turned the gun on himself and died as a result of a self-inflicted gunshot wound.