At approximately 1830hrs PSC dispatched the rescue local for the outer loop of the capitol beltway at annapolis road with reported entrapment. This brought Rescue Engine 33, Chief 33, and Chief 33A. An off duty firefighter arrived on scene and advised communications that there was 3 persons trapped in the vehicle. Rescue Engine 33 arrived on the scene and due the severity of the incident, was told to begin extrication as the rescue squad had not yet arrived. Rescue Engine 33 and Squad 806 completed full sidewall removals on both sides of the vehicle and extricated 2 patients out of the vehicle. Chief 33 had the extrication group.