Officials in the U.S. state of Florida say there have been multiple fatalities following a mass shooting at a video game tournament in Jacksonville.<br /> An exact death toll has not been released, but reports suggest eleven people were shot, with four of them being killed.<br />The sheriff's office says the suspect, who is yet to be identified, is among the dead.<br />Authorities say they believe the gunman acted alone and are investigating the motive for the shooting. <br />
