Multiple fatalities in Florida workplace shooting

A man fired from his warehouse job in April returned to his old workplace near Orlando on Monday and fatally shot five people before killing himself, Orange County Sheriff Jerry Demings said.

The unidentified assailant arrived at the company that makes accessories for recreational vehicles and campers at about 8 a.m. EDT armed with a handgun and a knife, Demings said.

Almost a year ago, on June 12, 2016, 49 people were killed at the Pulse nightclub in Orlando, the deadliest mass shooting in modern U.S. history.

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Multiple fatalities in Florida workplace shooting

Orange County Sheriff Jerry Demings, left, answers questions at a news conference near the scene of a shooting where there were multiple fatalities in an industrial area near Orlando, Fla., Monday, June 5, 2017. (AP Photo/John Raoux)

Multiple fatalities in Florida workplace shooting

Crime scene investigators prepare to enter the scene of a shooting where there were multiple fatalities in an industrial area near Orlando, Fla., Monday, June 5, 2017. The Orange County Sheriff’s Office said on its official Twitter account that the situation has been contained. (AP Photo/John Raoux)

Multiple fatalities in Florida workplace shooting

Investigators work the scene of a multiple shooting at an area business in an industrial area on June 5, 2017 northeast of downtown Orlando, Florida. According to published reports, five people were killed in the attack by a man police described as a disgruntled former worker at Fiamma, Inc., which makes accessories for campers and other recreational vehicles. The attacker killed himself, according to police. (Photo by Gerardo Mora/Getty Images)

Multiple fatalities in Florida workplace shooting

This March 19, 2010 booking photo made available by the Seminole County Sheriff’s Office, shows John Robert Neumann Jr., who was arrested for possession of marijuana. Neumann killed several people and then took his own life at an Orlando, Fla., awning factory Monday, June 5, 2017. (Seminole Country Sheriff’s Office via AP)

Multiple fatalities in Florida workplace shooting

The Orange County Sheriff’s Office says there have been multiple fatalities in a workplace shooting in Orlando, Florida. (Reuters)

Multiple fatalities in Florida workplace shooting

Law enforcement officers, including a K-9 unit, investigate near the scene of a shooting where there were multiple fatalities in an industrial area near Orlando, Fla., Monday, June 5, 2017. The Orange County Sheriff’s Office said on its official Twitter account that the situation has been contained. (AP Photo/John Raoux)

Multiple fatalities in Florida workplace shooting

Police work near the scene of a shooting where they said there were multiple fatalities in an industrial area near Orlando, Fla., Monday, June 5, 2017. (Jacob Langston/Orlando Sentinel via AP)

Multiple fatalities in Florida workplace shooting

Investigators work the scene of a multiple shooting at an area business in an industrial area on June 5, 2017 northeast of downtown Orlando, Florida. According to published reports, five people were killed in the attack by a man police described as a disgruntled former worker at Fiamma, Inc., which makes accessories for campers and other recreational vehicles. The attacker killed himself, according to police. (Gerardo Mora/Getty Images)

Multiple fatalities in Florida workplace shooting

Multiple fatalities reported in shooting in industrial area near Orlando, Florida on June 5, 2017. (ABC-TV)

Multiple fatalities in Florida workplace shooting

The Orange County Sheriff’s Office told ABC affiliate WFTV the situation is “contained,” but did not elaborate on how many people were killed in the shooting. (ABC-TV)

Multiple fatalities in Florida workplace shooting

Authorities confer, Monday, June 5, 2017, near Orlando, Fla. Law enforcement authorities said there were “multiple fatalities” following a Monday morning shooting in an industrial area near Orlando. On its officials Twitter account Monday morning, the Orange County Sheriff’s Office said the “situation” has been contained. They said Orange County Sheriff Jerry Demmings will make a statement “as soon as info is accurate.” (AP Photo/John Raoux)

Multiple fatalities in Florida workplace shooting

Emergency vehicles stage near the site of a shooting, Monday, June 5, 2017, near Orlando, Fla. Law enforcement authorities said there were “multiple fatalities” following a Monday morning shooting in an industrial area near Orlando. On its officials Twitter account Monday morning, the Orange County Sheriff’s Office said the “situation” has been contained. They said Orange County Sheriff Jerry Demmings will make a statement “as soon as info is accurate.” (AP Photo/John Raoux)

Multiple fatalities in Florida workplace shooting

Police work the scene of a multiple shooting at an area business in an industrial area on June 5, 2017 northeast of downtown Orlando, Florida. (Photo: Gerardo Mora/Getty Images)

Multiple fatalities in Florida workplace shooting

A man who had been fired in April from his job at a Florida company opened fire June 5, 2017 at the Orlando-area business, killing five people before taking his own life, authorities said. (Gregg Newton/AFP/Getty Images)

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