According to the D.C. Police Department, there is a possible gunman inside Spingarn Senior High School. The school is on lockdown at this time. WaPo reports that police are setting up a command post.
We just called the school. This sounds like a false alarm. We asked the secretary who answered phone about the possible shooter [...]

The D.C. Jail is on lockdown. A Sept. 24 release announces that the Department of Corrections (DOC) has instituted a "non-emergency security procedure" at the D.C. Jail until October 6. Inmate movement is restricted. A sign on the visitor's door says the lockdown started on Sept. 22 and that no visitors are allowed.
DOC spokesman [...]