By Innocent Onoja with Agency report
Two people have been shot dead by a gunman at an entertainment complex in Jacksonville, Florida, police say.
The killer, named David Katz, 24, from Baltimore, also shot himself dead at the scene.
No other suspects are being sought.
Eleven other people were injured in the incident.
The shooting happened during a video game tournament being held at Jacksonville Landing, a large shopping, entertainment and dining complex.
Katz used only one hand gun, the police said, according to their investigations so far.
Police refused to confirm local media reports that he began shooting after becoming angry following a loss at the gaming tournament.
Florida has seen several mass shootings in recent years, including at the Pulse nightclub shooting in Orlando in 2016, when 49 people died, and the Marjory Stoneman Douglas School in Parkland in February this year, when 17 people were killed.
Gamers were playing the American football game Madden NFL 19 at the GLHF Game Bar in Jacksonville Landing when shooting erupted on Sunday afternoon.
Many shots can be heard in a video that appears to show the event being streamed online on the Twitch platform.
Drini Gjoka, a 19-year-old player taking part, described the shooting in a series of posts on Twitter, calling it “the worst day of [his] life.”
He tweeted that a bullet had hit his thumb.
People fled for shelter when the shooting began and police appealed to them to stay calm as Swat teams checked the area for possible accomplices before it was confirmed that only one gunman had been involved.
Taylor Poindexter from Chicago said she saw the gunman taking aim at people in the room.
“We did see him, two hands on the gun, walking back, just popping rounds,” she said. “I was scared for my life and my boyfriend’s.”
“There were nine victims transported by JFRD (Jackonville Fire and Rescue Department) to area hospitals.
Some of those have gunshot wounds.
There were two additional gunshot victims that self-transported themselves to local hospitals,” said Sheriff Mike Williams.
The victims are not being named until their next-of-kin are informed.
“Tonight, Jacksonville is mourning. We’ve faced an occurrence that is all too common that will require us to continue to do the hard work of public safety,” said Jacksonville Mayor Lenny Curry.
EA Sports, the company that owns Madden and approved the competition, told the BBC it was “devastated by this horrific event… a senseless act of violence that we strongly condemn.”
It sent its heartfelt sympathies to the families of the victims.