Yes, one arrest according to reports from the scene. A young African-American woman was wearing a kerchief over her face and refused to remove it when ordered by police, so she was arrested for wearing a mask in public (apparently a felony in Virginia!). This occurred outside the Capitol Square area and it remains unclear whether the woman was part of the protest or simply a local resident going about her business on a chilly morning. Others present noted that many of the police officers on duty were wearing tactical baclavas concealing their faces.

Should make for an interesting court case.