White House Lockdown Lifted After Suspicious Package Thrown Over Fence

UPDATED: May 30, 2016, 3:45 PM ET

The White House was put on lockdown Monday afternoon after a woman threw an unknown object over the fence at the North Lawn, according to the Associated Press.

A woman was handcuffed and taken into custody after the object was thrown over the fence, near Pennsylvania Avenue, AP reported. The lockdown ended shortly before 4 p.m. ET, NBC News reported.

The lockdown began shortly after President Obama returned to the White House after a Memorial Day event at Arlington National Cemetery.

CBS White House correspondent Mark Knoller tweeted that a suspect had been detained and Hazmat teams were set to examine the package.

NBC also reported on air that law enforcement had set up a portable decontamination unit and were putting on Hazmat suits.

Video from witnesses near the scene showed a heavy law enforcement presence.

This is a breaking news story. We will provide updates as they are available.

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