The lockdown was first initiated around 1:15 p.m. Tuesday after an unattended bag was found along the White House's North Fence line.
Gabby Morrongiello, a reporter with the DC Examiner tweeted out that everyone was sent to the Briefing Room while the Secret Service investigated. Reporters and construction workers were told to stay inside.
A spokesman for the U.S. Secret Service said the package was determined safe about an hour later but the owner has not been located.
They announced Tuesday afternoon that the package had been successfully cleared.
As a result, Pennsylvania Avenue between 15th Street and 17th Street and the area of Lafayette Park were closed to pedestrian traffic.
UPDATE 2:30 p.m. ET - NBC's Peter Alexander reports that the media has received the all clear at the White House.
President Donald Trump is not at the White House. He was not able to enter the building itself.