"We're aware of the incident", said White House deputy press secretary Hogan Gidley from Mar-a-Lago.
Police in Washington DC confirmed that an "adult male has been declared deceased".
A man shot himself in the head in front of the White House at just before noon Saturday, a Secret Service spokesperson has told CNN.
The shooting sparked panic inside the building, with staff and journalists told to take shelter.
President Trump and his wife Melania are not now at the White House, instead staying in Florida at the Mar-a-Lago resort.
Secret Service agents raced to the site following the shooting at around 5pm United Kingdom time on Saturday.
Outside the White House several blocks are closed down by the Secret Service after reports a person allegedly suffered a self-inflicted gunshot wound.
The incident affected pedestrian and vehicular traffic around the White House, the Secret Service said earlier on Twitter. None of those rounds appeared to have been aimed at the White House, the agency said.
The security scare came a little more than a week after a vehicle hit a security barrier near the White House, resulting in the arrest and charge of a 35-year-old driver. "We're working to notify next of kin".
"The President has been briefed".