The Secret Service arrested an individual on Wednesday after they allegedly dropped a backpack and attempted to jump a bike rack outside the White House on Pennsylvania Avenue, forcing the complex to briefly lock down.

The incident took place at 2:45 p.m., the Secret Service said, and prompted law enforcement to cordon off Lafayette Park and close Pennsylvania Avenue between 15th and 17th streets to traffic. The bike racks are located near the fences along the perimeter of the building.

At approximately 2:45 pm an individual dropped a backpack and attempted to jump a bike rack along the sidewalk on Pennsylvania Ave. The individual was immediately taken into custody by Secret Service Uniformed Division Officers. — U.S. Secret Service (@SecretService) June 19, 2019

Law enforcement officials are responding to the incident on the sidewalk of Pennsylvania Ave. Pedestrian traffic is closed along Pennsylvania Ave. between 15th and 17th streets to include Lafayette Park. — U.S. Secret Service (@SecretService) June 19, 2019

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Around the same time, multiple White House correspondents tweeted that the building had gone into lockdown and that the Secret Service had asked them to go into the briefing room.

Mark Knoller of CBS News tweeted a photo that showed armed Secret Service officers positioned on the North Lawn.

The bike racks form an outer perimeter about 10-15 feet away from the actual WH fenceline. But @SecretService take any breach seriously. pic.twitter.com/pwT5tGCTRy — Mark Knoller (@markknoller) June 19, 2019

Heavily armed Secret Service seen taking positions behind trees on the North Lawn of the WH. Press then cleared from the area. pic.twitter.com/1zc0R3jNdO — Mark Knoller (@markknoller) June 19, 2019

White House is on lockdown, press has been ordered inside. Sounds like there might have been a suspicious package left on Pennsylvania Ave, though that is unconfirmed at this time. pic.twitter.com/6P7k8Z9tXA — Jeff Mason (@jeffmason1) June 19, 2019

White House on lockdown; reporters ordered into briefing room. Secret Service not commentinh yet on situation. President is returning from Miami at this hour — West Wing Reports (@WestWingReport) June 19, 2019

The Secret Service announced just after 3:30 p.m. that the package had been cleared with assistance from the D.C. Police Department. The pedestrian traffic closures were lifted a short time later.

President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE was not in the White House at the time. The president was traveling back to D.C. from Florida, where he officially launched his 2020 reelection bid on Tuesday evening.

The Secret Service did not immediately respond to a request for comment about whether the incident on Pennsylvania Avenue was the cause for reporters being ushered inside.

Updated at 3:45 p.m.