At 16:32 hrs. Co.24 was dispatched for a MVA at Route 26 & Monocacy Blvd. E23 went on the scene to find a collision of a car vs school bus then the crew began evaluating the vehicles for leaking fuel and assist with PT care. Soon after C2-1 arrived on scene and took command. A247 arrived on scene and started patient care. C2-1 requested a second ambulance and Medic unit for a second PT. RS24 arrived on scene to stabilize the vehicle. A249 arrived on scene to take patient care of the second PT. Both patients were both taken to FMH. Command was terminated and units went in service.