One of the vehicles involved  — witnesses say it was a D.C. taxi cab — lost control while driving toward Clarendon on Wilson Boulevard. The vehicle slammed into a car just outside Arlington Autocare, causing one of the store’s windows to break. It continued through the intersection, took out a traffic light control box, smashed several cars in an auto dealership lot, and slammed into the side of the Doctor’s Building before coming to rest.

At least one person was transported to a local hospital. Initial reports suggest the accident may have happened when the cab driver suffered some sort of medical emergency.