A 16-year-old female student was killed, another student was wounded, and the shooter—a 17-year-old male student—killed himself, per police.

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.

An AI gun detection system installed in a Nashville, Tennessee high school couldn’t spot the gun a 17-year-old used to fatally shoot another student and himself earlier this week, according to district officials.