(Updated 03/20/2018) A sheriff says the school resource officer who shot at the suspect during a shooting at a Maryland high school is unhurt.

Great Mills High School (Courtesy photo)

Speaking at a news conference, St. Mary’s County Tim Cameron says the male student was armed with a handgun Tuesday morning when he wounded a female student and a male student just before classes began at Great Mills High School in southern Maryland.

Cameron says all three were hospitalized and the shooter was later pronounced dead.

Cameron says the shooter and the school resource officer both fired and it wasn’t immediately known if the officer’s bullet killed the suspect.