Suspicious person leads to lockdown at Southshore
Clear Fork Middle School on lockdown after reported threat - Morrow County Sentinel
Several Colorado schools put on lockdown Wednesday
ACPSD updates safety precautions at Aiken High, throughout district, Aiken Area Education
Decision 2020 Hoover Institution
Clear Creek ISD high school campus under lockdown as precaution
Social media threat leads to Lamar HS lockdown, principal says
St. Mark's Hospital briefly placed on lockdown
Apex student found with BB gun after school was placed on lockdown; juvenile petition sought
Matheson JHS on precautionary lockdown
Tamarac Summer Camp Placed on Lockdown: Unusual Behavior Sparks Shooting Scare, Ends in Safe Resolution