U.S. Capitol
© Jason Reed/ReutersA general view of the U.S. capitol building in Washington D.C.
The US Capitol building is on lockdown amid intense "police activity." People have been told to take shelter in their offices, ensuring that the doors are locked. Reports suggest an armed person attempted to enter the building.


Law enforcement said they ordered the lockdown "because of police activity," Reuters reports.

One Capitol Police officer told the news agency an "event" was under way and the authorities were looking for someone.

Police said no one would be allowed to leave or enter the building until the lockdown is lifted.

A congressional staffer was seen with a firearm in the building, according to The Hill publication.