Adams City High School students returned to class Sept. 22 after an unsubstantiated threat closed the building the day before.

A combined investigation between Adams  District 14 officials and  Commerce City police determined that the threat that closed the campus Sept. 21 was "not substantiated"  according to a statement.

Classes were set to resume, with extra personnel and law enforcement on hand to monitor the situation, the statement said.

"Adams 14 is committed to providing a safe and healthy learning environment for all," the statement said. "We understand that any threat of violence in our community can be stressful for our families, students, and staff. For this reason, there will be additional counselors available at the high school for the social and emotional support needs of both our students and staff."

The district statement asked parents to talk to their children about the dangers of making a threat to use a weapon or bringing a weapon of any sort to school.

"All weapons are strictly prohibited on school property by any person with the exception of law enforcement professionals," the statement said. "The district will work with all local and federal agencies to prosecute any and all individuals who make a threat to the maximum extent of the law. We have a no-tolerance policy for any behavior that jeopardizes the well-being of our students and staff."

Overnight threats of on-campus violence at Adams City High School caused Adams 14 officials to cancel classes Sept. 21. Various statements mentioned nothing specific about this incident. The school was in an hour-long lock down Sept. 18 after a student brought a gun to school. No one was injured.

There was no indication from officials that these incidents at Adams City have anything to do with at least three swatting, or fake calls involving active shooters, that happened in Colorado earlier in the week. One was in Denver, one was in Montrose and the third was in Alamosa.

Extracurricular activities for Sept. 20 were canceled. 

Those with information or questions about these or other threats can call Safe2Tell at  877-542-7233.