The Metro Nashville Police Department opted to permanently add a third school resource officer to Antioch High School as students return Tuesday.

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.

Two students were shot by another student before turning a gun on himself at Nashville ’s Antioch High School on Wednesday, according to police. Police were called to the school at 11 a.m. ET, according to the Metropolitan Nashville Police Department. The suspected shooter is “no longer a threat,” police said.