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A gunman opened fire at a "Madden" video game tournament on Sunday afternoon at a popular Jacksonville mall, killing two people and injuring multiple others before turning the gun on himself and taking his own life. 

The shooting occurred at Chicago Pizza at the Jacksonville Landing, with the Jacksonville Sheriff's Office reporting that the first 911 call came in at 1:34 p.m and law enforcement officials were on the scene two minutes later. Three deceased, including the shooter, were found at the scene, while nine other victims with gunshot wounds were transported to local hospitals via ambulance and two other victims arrived at hospitals by car, per the Jacksonville's Sheriff's Office. 

Jacksonville Sheriff Mike Williams said all of the victims were in stable condition on Sunday night and identified the suspect as David Katz, 24, of Baltimore. The FBI in Baltimore was assisting with the investigation, Williams said, and the shooter's car had been impounded. 

A live stream of the event appeared to capture audio of the shooting and its aftermath. (Be advised: The audio is extremely difficult to listen to.)

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A screen grab from the GLHF twitch channel of a live stream feed during the EA Madden Southeastern Qualifiers Playoffs video game tournament.  USATSI

Drini Gjoka, one of the players at the tournament, tweeted that one of the bullets hit his thumb. 

For more on this story, CBS News has live updates on the latest developments.