WASHINGTON, D.C. -- Senate officials say no one is being allowed in or out of Senate buildings while authorities search for a potential second suspect in the Navy Yard shootings.
Senate Sergeant at Arms Terrance Gainer said Monday that people could move around the buildings but could not leave or enter. He said he had no information to suggest the Senate, its members or staff were in danger but took the step out of an abundance of caution.
The House remained open.
Authorities said as many as two gunmen opened fire Monday morning inside the Washington Navy Yard, killing at least 12 people in an attack on office workers at the heavily secured military installation in the nation's capital. One gunman was dead and police hunted for a second possible attacker.