A teen armed with a shotgun and a handgun unleashed terror at an Iowa high school on the first day of classes in the new year, authorities said, killing a sixth grader and wounding five others as people hunkered down in classrooms, barricaded offices and fled the barrage of bullets.

The suspect, a 17-year-old student at the school in Perry, died of what investigators believe was a self-inflicted gunshot wound, an Iowa Division of Criminal Investigation official said. An administrator, later identified by his alma mater as Perry High School Principal Dan Marburger, was among the five wounded Thursday as students returned from winter break.