Police sealed off the U.S. Capitol Friday after reports of gunfire in a House office building across the street... Blackberry message: This is a message from the U.S. Capitol Police 1. If you are in the Rayburn HOB then Shelter in Place. Quickly move into the nearest interior office space or interior hallway and away from windows. The Capitol Police are investigating reports of gunfire in the Rayburn HOB. 2. If nearby, grab Go-Kits and personal belongings. 3. Close doors behind you, but do not lock. 4. Remain calm. 5. Await further instructions. Do not leave the building.