Eleven people were wounded by the gunfire of whom four have died Efe reported.
The police said a mass shooting led to multiple fatalities and warned people to stay "many blocks" away.
The Jacksonville Sheriff s Office said on Twitter that the shooting took place in Jacksonville Landing a downtown market place and warned everyone to stay "many blocks" away from the area as the area "is not safe at this time" Xinhua reported.
The shooting reportedly took place at a video gaming competition.
--IANS qd
