Officers responded to the school at 520 Walnut Street shortly after 1 p.m., according to the Santa Ana Police Department, and a bomb squad was summoned to the scene.
The suspect, whose whereabouts at the school were unknown, was believed to be a student, a police spokesperson told ABC7.
“No one is currently allowed in or out of campus to help ensure the safety of our students and staff,” the Santa Ana Unified School District said in a statement. “Students are safe and all security protocols are being followed.”
News video from AIR7 HD showed officers who arrived at the campus in several patrol and SWAT vehicles.
One person, who appeared to be conscious and alert, was wheeled away from the campus on a gurney by first responders and placed in an ambulance. Whether that person was seriously injured was unclear.
The Police Department urged the public to avoid the area.
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