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JACKSONVILLE, Fla. – Facebook has activated its safety feature after a mass shooting left multiple people dead at a video game tournament Sunday in Jacksonville.

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The feature allows users to let friends and others know they are safe after a catastrophic event, including natural disasters, terror events and mass shootings.

>>Read “Police: ‘Multiple fatalities’ after ‘mass shooting’ in Jacksonville

The shooting happened around 1:45 p.m. near the Chicago Pizza at the Jacksonville Landing, a popular riverfront area, during a qualifying round of a sanctioned Madden Championship Series event.