Police said the suspect sustained a self-inflicted gunshot wound and the school district said Antioch High School is on lockdown.

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.

A student opened fire inside Antioch High School, shooting two other students and then himself, the authorities said. A female student and the shooter were killed, officials said.