The U.S. Senate and its adjacent office buildings on the Capitol grounds have been locked down following Monday's fatal shootings at the nearby Navy Yard, the Senate Sergeant at Arms announced.
Workers in the buildings cannot leave and nobody is being allowed to enter, according to a statement.
"We do not have any information to suggest the Senate, its members, or staff are in any danger, but out of an abundance of caution, we feel this is the best course of action to keep everyone safe," said Sergeant at Arms Terrance Gainer.
The Senate canceled its Monday session because of the Navy Yard shooting.
The House of Representatives, which is not in a work session on Monday, has not received any lock-down notice, according to officials.
Gainer said the decision to lock down Senate buildings was made because of the "possibility of suspects remaining at large."
At least 12 people were killed in the shooting at the Navy Yard, which is less than 2 miles (3.2 km) from the Capitol building. One suspected gunman was among the dead and authorities were searching for two other possible assailants wearing military-style clothing, officials said.
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