(Updated at 3:50 p.m.) A multi-vehicle accident has closed a stretch of Wilson Boulevard near Clarendon.

One of the vehicles involved took out a traffic light control box, smashed several cars in an auto dealership lot, and slammed into the side of a building before coming to rest. At least one person was transported to a local hospital. The accident involved at least three vehicles, including a D.C. taxi cab.

Initial reports suggest the accident may have happened when one of the drivers suffered some sort of medical emergency.

The stretch of Wilson Boulevard between 10th Street and Washington Boulevard is currently closed. Traffic signals at the Wilson Boulevard and 10th Street N. intersection are expected to remain dark for several hours. Police have set up cones in the intersection to allow traffic to flow through, without turning.