"Omar Mateen was employed by G4S at a residential community in South Florida and was off-duty at the time of the incident," G4S said in a statement. (AP Photo)

By Anna Giaritelli (@anna_giaritelli) • 6/13/16 7:05 PM

An international security company confirmed Monday afternoon it was the employer of the man who fatally shot 48 people at an Orlando nightclub early Sunday morning.

G4S, a large security organization, is a major federal contractor for the Homeland Security and State departments.

"Omar Mateen was employed by G4S at a residential community in South Florida and was off-duty at the time of the incident. Mateen was subject to detailed company screening when he was recruited in 2007 and re-screened in 2013 with no adverse findings. He was also subject to checks by a U.S. law enforcement agency with no findings reported to G4S," the company said in a statement.

The UK-based G4S employs more than 610,000 employees around the world, according to its website. The company oversees security at 40 U.S. embassies worldwide and also assists U.S. Border Patrol agents.

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