6 Dead In Shooting At Orlando Business

A man returned to his workplace months after being fired and shot five before turning his gun on himself, police said Monday.

The subject, a 45-year-old "disgruntled employee," entered Fiamma Incorporated, an Orlando, Florida, company that makes RV accessories, around 8:03 a.m. local time with a handgun and a knife, Orange County Sheriff Jerry Demings said in a news conference.

The man shot and killed three men and one woman. A fifth man later died of his injuries at a local hospital. Seven people were injured.

The subject was fired sometime in April of this year, Demings said. He had a criminal history "minor in nature," including marijuana possession and a DUI. He reportedly battered a fellow Fiamma employee in 2014, Demings said, but this person was not present during Monday's shooting.

"It appears that this incident has nothing to do with any global terror activities," the sheriff said.

Orlando has been preparing to mark the one-year anniversary of the deadliest mass shooting in U.S. history, which took place at the city's Pulse nightclub.

See more photos from Monday's incident:

• GREGG NEWTON via Getty Images
  Law enforcement officials speak near the crime scene in Orlando.
• GREGG NEWTON via Getty Images
  A law enforcement official wipes her eyes at the entrance to the crime scene.
• Gerardo Mora via Getty Images
  Investigators work the scene of the multiple shooting.
• Gerardo Mora via Getty Images
  According to published reports, five people were killed in the attack by a man police described as a disgruntled former worker at Fiamma, Inc. The company makes accessories for campers and other recreational vehicles.
• GREGG NEWTON via Getty Images
  Law enforcement officials speak near the shooting crime scene.
• Gerardo Mora via Getty Images
  Investigators work near the scene of the shooting.