The move came after a vehicle followed a motorcade into a secure area at 4:40 p.m., a U.S. Secret Service spokesperson said. The motorcade included the two daughters of President Barack Obama, who go to school nearby, according to a source familiar with the incident.
The driver was stopped by uniformed officers at the outer perimeter of a checkpoint at 17th Street and Pennsylvania Avenue and taken into custody, according to the spokesperson.
The source familiar with the incident said the driver holds a pass for the U.S. Treasury building, which sits next to the White House on Pennsylvania Avenue.
About one hour after it began, journalists inside the White House were told the lockdown had been lifted.
Due to tight security at the home of the President, even minor breaches can bring a lockdown.
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