A 55-year-old gunman killed one person and injured four others in Washington, DC’s Logan Circle neighborhood, according to police. • The assailant — identified by police as Matt Lambert, an emergency room doctor — shot and killed his building manager inside a gym with a handgun. He then entered the building, where he shot four more people with a rifle from his seventh-floor balcony, authorities said.

One of the victims remains in critical condition. CNN’s Brian Todd reports.