North Arvada Middle School was placed on lockdown Tuesday after a student saw a weapon in another student's backpack, according to Jeffco Public Schools.
The student reported the sighting and the school was placed on lockdown while JeffCo Public Schools security and Arvada Police Department officers investigated.
"The weapon was located; it was a BB gun," Jeffco Public Schools said. "The district commends the students that reported what they saw; all of us doing the responsible thing is truly what keeps us safe."
Officials did not say if the student with a BB gun will face any discipline.