Atlanta active shooter: Multiple people injured in Midtown, police say

School shooting in Nashville leaves several injured

Multiple people shot at Maryland warehouse

Active Shooter in Atlanta | Multiple shot, suspect on the loose

Multiple People Shot At Tulsa Hospital, Police Report Shooter Is Down

Chesapeake Walmart shooting kills multiple people, police say

Police swarm Iowa high school as active shooter

Multiple people dead after active shooting incident in Maine

NEWS: 18 shot in El Paso, Texas

San Bernardino Shooting - "Upwards of 14 dead in San Bernardino": Police

Officials Say 'Multiple Fatalities', More Injured In #SanJoseShooting

BREAKING NEWS All Schools In Littleton Colorado In Lockdown After High School Shooting

Multiple injured in shooting in Maryland, deputies say

Breaking News Multiple Shot at St Louis Business Missouri

Dallas police, school police and fire department conduct joint active shooter training drills

#Canada stabbing update: 10 people dead, more than a dozen injured in Saskatchewan Province