A man was pinned to the ground under the rear wheels of a Greyhound bus around 1:10 PM on Wednesday. The accident occurred as the bus was making a left turn onto 7th Street from Massachusetts Avenue, D.C. Fire & EMS spokesman Tim Wilson said. The pedestrian was quickly sent to a nearby hospital and is now in critical condition. 7th Street is now blocked both ways north of I Street and south of New York Avenue, and various other roads have been diverted.