According to Billings Public Schools, Senior High School is currently on lockdown.

UPDATE: Senior High remains in lockdown, all students and staff are safe and secure. The Billings Police Department is continuing their search.

October 22nd 12:30 PM:

We are currently in a lockdown at Senior High and are working with the police department in following up on an alleged threat of students who may have weapons. We will keep you informed as we know more. Updated information will also be available on the district website.