A man who drove to a security checkpoint near the White House in a car that was deemed suspicious has been detained by the U.S. Secret Service.
The car was stopped Saturday night about a quarter-mile from the White House.
Two law enforcement officials told CNN the driver said there was a bomb in his vehicle.
There was no confirmation on whether there was any device in the vehicle, but security at the White House was immediately upgraded.
The incident occurred at 11:05 p.m. at a security checkpoint, the Secret Service said. Four hours later, the checkpoint in question remained blocked, but streets re-opened, and bomb technicians and other additional security personnel left the area.
The Secret Service says it's investigating. It hasn't said what caused the car to be considered suspicious.
President Donald Trump wasn't at the White House because he and his family are spending the weekend at his resort in Palm Beach, Florida.
Earlier Saturday someone jumped a low metal barrier just outside a White House fence.
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.