Update: More details on the accident from WashCycle.
I walked by this scene at 31st and M in Georgetown last night: squad cars and yellow tape around a Washington Flyer taxi, its windshield badly cracked, a mangled bicycle under its tires. Vnangia tweets that the accident was fatal. MPD had officers directing traffic around the scene (which got a bit confusing for drivers and pedestrians alike as the traffic lights were still running at the time, nearly causing more accidents), and M Street was backed up significantly. (But then, when isn’t it?)