The mishap took place as the jeep with half a dozen occupants overturned after ramming to a railing of a culvert due to negligence of the driver, police said, adding a woman, identified as Girija Devi (45) died on the spot, while four other persons sustained injuries.
The body has been sent for post-mortem and the injured persons admitted to the Sadar hospital at Motihari for treatment, they said.
The jeep has been impounded even as its driver managed to escape, police added.