Texas school locked down after reports of active shooter

Active shooter reported at Texas high school

Shanghai's 26 million residents still locked down after 13,000 asymptomatic #COVID19 cases detected

Active shooter incident at Santa Fe High School in Texas

Police swarm Iowa high school as active shooter

Reports of active shooter at YouTube in San Bruno

Ohio State University Reports Active Shooter On Campus

Raw - Texas campus locked down after apparent murder-suicide

Cancun hotel guests shelter in place amid reports of an active shooter in the resort

Las Vegas Police: Reports Of Active Shooter Near Mandalay Bay Casino

News Arapahoe High School Shooting Active shooter situation

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School Evacuated After Reports of Fainting

School shooting in Nashville leaves several injured

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#VIDEO: The moment Nashville school shooter is gunned down.