Updated

The Latest on a fatal mass shooting at riverfront mall during a video game tournament in Jacksonville, Florida (all times local):

4:55 p.m.

A source close to the investigation says a mass shooting during a video game tournament at a Jacksonville, Florida, riverfront mall has left four people dead.

The source says the person who opened fire died from a self-inflicted gunshot wound. The source spoke to The Associated Press on condition of anonymity because he wasn't authorized to release information on the shooting. It wasn't immediately clear if the source was including the suspect in the death toll.

Jacksonville Sheriff Mike Williams said at a news conference Sunday afternoon that the suspect, a white male whose identity authorities are still seeking to confirm, had died. He did not elaborate, but said the shooting site had since been secured.

Several other people were taken to hospitals.

Sounds of the shooting were captured as the gaming tournament was being livestreamed.

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4:45 p.m.

Florida authorities say they've finished clearing the scene of a fatal mass shooting at a riverfront mall in Jacksonville and there are no additional suspects.

Speaking to reporters Sunday afternoon, Jacksonville Sheriff Mike Williams says a suspect is dead at the scene and they are still working to identify the male.

The sheriff's office says the shooting, which erupted during a video game tournament, has left multiple dead and sent others to the hospital. Williams did not give any details on the number of people killed or wounded.

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4:45 p.m.

It didn't take long for some Democratic candidates for governor to issue statements on a mass shooting in Jacksonville that left multiple people dead.

In the wake of the Feb. 14 Parkland school shooting that left 17 dead, gun violence has been a major issue ahead of Tuesday's primary election, in which voters will pick the Republican and Democratic nominees to replace outgoing Republican Gov. Rick Scott.

Former U.S. Rep. Gwen Graham sent an email to supporters that said the only way to end mass shootings is to "vote out the politicians complicit in this cycle of death."

Former Miami Beach Mayor Philip Levine also released a statement saying, "I am horrified and I am furious" and that it's time for new leaders.

Video game manufacturer Electronic Arts tweeted, "This is a horrible situation, and our deepest sympathies go out to all involved."

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3:10 p.m.

Florida authorities say one suspect is dead at the scene after a fatal mass shooting at a riverfront mall in Jacksonville.

But on its Twitter feed, the Jacksonville Sheriff's Office says it's unknown at this time if there's a second suspect and searches are being conducted.

The sheriff's office says multiple people have been killed in the shooting.

The department says to "stay far away from the area. The area is not safe at this time. STAY AWAY." They also warned news media to stay away from the area, which contains restaurants and shops along the St. Johns River.

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2:55 p.m.

Florida authorities are reporting a multiple people dead and "many transported" to hospitals after a mass shooting at a riverfront mall in Jacksonville.

The Jacksonville Sheriff's Office used Twitter and Facebook to warn people to stay away from the Jacksonville Landing.

The department says to "stay far away from the area. The area is not safe at this time. STAY AWAY."

The sheriff's office didn't provide any other information, but also warned news media to stay away from the area, which contains restaurants and shops along the St. Johns River.

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2:40 p.m.

Florida authorities are reporting a mass shooting at a riverfront mall in Jacksonville.

The Jacksonville Sheriff's Office used Twitter and Facebook to warn people to stay away from the Jacksonville Landing.

The department says to "stay far away from the area. The area is not safe at this time. STAY AWAY."

The sheriff's office didn't provide any other information, but also warned news media to stay away from the area, which contains restaurants and shops along the St. Johns River.