The man then fatally shot himself in the head, the Secret Service said.
Washington DC Police said the man approached the White House's fence just before noon local time yesterday before taking out a handgun and firing several shots.
U.S. Secret Service responded to the sound of shots fired.
The White House the official home of the United States president, has been placed on lock-down.
President Donald Trump was spending Saturday at his club in Palm Beach, Fla., at the time of the reported gunshot Saturday.
Staff were instructed to take shelter inside after the incident occurred in the afternoon.
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No one else was injured, although there were reports that people at the White House sheltered in place.
The man fired a self-inflicted gunshot wound, and the Secret Service said there were no other injuries. "Trying to learn more".
"We are aware of the incident", White House deputy press secretary Hogan Gidley told CNN.
Most recently, on February 23, a auto drove into a security barrier outside the building.
"You can get pretty darn close to the White House with a weapon", Hosko said, describing how security is tight around the White House, but people are allowed to get relatively close to the perimeter.
The District of Columbia Police Department said in a tweet that an "adult male has been declared deceased. We're working to notify next of kin".