About a week earlier a man breached an outer perimeter fence and scaled a vehicle gate to gain entry to the White House grounds, raising questions about lapses in security under the Secret Service's watch.
The Secret Service described it as an "ongoing criminal investigation".
"This is a test", the man said as a Secret Service officer detained him and took him to the ground, according to the report. The vehicle is being checked, the officials said.
The Secret Service said it was amping up security after the incident.
Several streets around the White House were closed and security at the White House has been upgraded.
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On Thursday, a Secret Service laptop containing Trump Tower floor plans and evacuation protocols, as well as information on the Hillary Clinton email investigation and other "sensitive" national security issues, was stolen Thursday morning from an agent's auto in Brooklyn.
Other authorities could not be reached immediately to confirm more details.
It was the second scare at the presidential residence on Saturday after a person jumped over a bike rack in a buffer zone in front of the White House at 12:40 p.m.
The Secret Service detained a man who drove up to a White House checkpoint late Saturday night and claimed to have a bomb in his vehicle, two law enforcement officials told CNN.
President Donald Trump was not at the White House on Saturday.