A woman was allegedly sexually assaulted by two of her fellow firefighters while at a Northwest D.C. firehouse, officials said. The alleged incident took place at the station on the 2200 block of M Street NW, which is in the West End neighborhood. D.C. Fire and EMS spokesman Tim Wilson said that, to his knowledge, a female firefighter has reported that she was sleeping early Friday morning when two male firefighters inappropriately touched her. The accuser had reported the incident to two supervisors who didn't immediately respond. When she filed a complaint a third time, police were contacted, Wilson said. Two firefighters and two supervisors have been placed on desk duty while police conduct an investigation, officials said.