Washington DC's Navy Yard facility is under lockdown Thursday morning, according to a Tweet from the US Navy, reports CNN.


This is the site of a 2013 shooting where 12 people were killed. So far, officials haven't found any evidence of a shooting, a law enforcement source told CNN.


Police are searching building 197 on Thursday morning, the same building where the 2013 Navy Yard shooting took place, a source with DC's Metropolitan Police Department tells CNN.


Police have cleared part of that building, according to the same law enforcement source.


The source said the original 911 call reported a shooting on the second floor.


The source confirmed that the Metropolitan Police and multiple law enforcement agencies are checking for a person with a gun in the building.


The US Navy says the facility is under a shelter-in-place order.