Two people have been killed and 11 others are being treated after a mass shooting incident at a video game tournament in Jacksonville, Florida, police have confirmed.

The shooter, who witnesses say was a losing participant, has committed suicide.

“There were three deceased individuals at the scene, one of those being the suspect, who took his own life,” the sheriff's office said. Eleven victims who suffered injuries in the shooting, including nine with gunshot wounds, have been transported by JFRD to area hospitals and are currently in “stable” condition.

Officers arrived at the scene at Chicago Pizza at 1:36 pm, about two minutes after reports about gunshots at the Madden 2019 gaming tournament were first received. Authorities immediately locked down the business while proceeding with evacuations. Shortly afterwards, bomb squad and SWAT team units arrived to sweep the area.

“The single suspect, in this case, is a white male, and this is pending confirmation, but we believe the suspect to be 24-year-old David Katz from Baltimore, Maryland,” Jacksonville sheriff Mike Williams said, noting that the FBI is assisting with the investigation in Baltimore.

“We know that the suspect used at least one handgun to commit this act,” the spokesman noted, adding that police have also located and impounded the suspect's vehicle. Authorities are now trying to identify where the suspect had spent the night. Police are also looking for additional videos from the crime scene to assist with the investigation.