Johnson County say a handgun was found in a student's backpack outside Spring Hill High School.
The Kansas City Star reports that a Johnson County sheriff's deputy assigned as a school resource officer was checking on a report of a student "in need of care" outside the school Thursday when the gun was found.
Spring Hill School District officials later posted a notice about the incident on the district website.

 Johnson County say a handgun was found in a student's backpack outside Spring Hill High School.
The Kansas City Star reports  that a Johnson County sheriff's deputy assigned as a school resource officer was checking on a report of a student "in need of care" outside the school Thursday when the gun was found.
Spring Hill School District officials later posted a notice about the incident on the district website.
The sheriff's office says the student wasn't arrested, but was given help in obtaining mental health treatment.
Spring Hill is a community of about 5,500 residents in southern Johnson County.