A coach bus went off Interstate 95 in Georgetown Tuesday night, injuring a number of people, officials said. Sara Lavoie, a spokeswoman for the state Department of Transportation, said the bus went off Interstate 95 near Exit 54, and two travel lanes were shut down. Georgetown police and fire and State Police responded to the scene. Ambulances were also sent, and a MedFlight helicopter was called, officials said. Further information was not immediately available.