They do not believe it has any relation to the terrorist attacks in London, Manchester, or the Pulse shooting. Pictured the shooter, known as John.
"Over the past year, the Orlando community has been challenged like never before", Florida Governor Rick Scott said in a statement. "It appears to be a work-related incident", CNN affiliate WFTV reported.
UPDATE: Witnesses are beginning to provide some details on the fatal shootings that took place inside a business in an industrial park in the Orlando area.
The sheriff's office said victim advocates are standing by at Family Unification Center at Full Sail University 3535 North Forsyth Rd.
On Monday, streets in an industrial area of city where the latest shooting occurred were closed, and patrol cars, officers and police dogs swarmed the scene.
Demings described the incident as a workplace shooting with no links to terrorism.
In a news conference, Sheriff Jerry Demings called the shooting that left four men and one woman dead early Monday a "tragic incident".
The 45-year-old suspect was armed with a handgun and a knife, and was a former employee of the company, which makes camping accessories.
"He was a disgruntled employee that came back to this business this morning", said Demings. They are now being interviewed by sheriff's detectives. No charges were filed at that time, Demings said.
He had a minor police record including arrests for DUI and marijuana possession.
To date, no details about the gunman, including his name, have not been released. It is unclear how the shooter, who has not been identified, got into the building.
Multiple deaths have been confirmed.
Orlando police later revealed the shooter dying after fatally shooting himself in a suicide following the mass shooting.
Adams said McIntyre was in a bathroom and saw someone on the floor when she got out.
"All she kept saying was he was holding a gun and told her to get out", Gomez said.