The Washington Navy Yard was placed on lockdown early Thursday morning after an employee reported hearing gunshots. Police ordered a shelter-in-place for an extensive area south of the Capitol and swept the area over the course of several hours. An all-clear was given just after 10 a.m. after police determined that the incident had been a false alarm, and the lockdown was lifted around midday after a thorough search was completed.

Today’s incident comes nearly two years after 12 people were gunned down at the headquarters of the Naval Sea Systems Command by lone gunman Aaron Alexis. Police were criticized after the incident for not having responded quickly enough. Speaking to the media, Police Chief Cathy Lanier said today’s response drew on lessons learned from the 2013 shooting.

District Mayor Muriel Bowser lauded police for their reaction, saying that today’s incident was not a hoax and that Navy Yard employees and police staged a ‘clear, coordinated, and convincing response.’

Photos by Trey Yingst

Article by Alejandro Alvarez and Dominick Mortarotti