WASHINGTON, DC — Police have cleared the scene Monday afternoon after a bomb threat and subsequent suspicious package investigation shut down part of 16th Street NW near the White House.

The Washington Post reports that a man called and said there was a bomb in a building Monday morning in the 800 block of 16th Street NW. Police could be seen milling around the AFL-CIO headquarters in that area.

Police blocked off sections of 16th and I streets during the investigation. One Twitter user reported having to shelter in place due to the threat.