(CNN) David Katz attended a tournament in Jacksonville on Sunday for competitive players of Madden, a football video game. Katz brought a gun into the venue, the GLHF Game Bar, in the back of a pizza restaurant, Jacksonville Sheriff Mike Williams said. Katz opened fire and killed two people, wounded nine others and turned the gun on himself, the sheriff said. Here's what we know about Katz:-- Katz was 24 years old and from Baltimore, Maryland, authorities said. -- He used a handgun in the shooting , according to a source close to the investigation.

Source: CNN August 27, 2018 11:34 UTC