evidence: The people blame the changing course of the Gandak river, known as Narayani in Nepal, for the controversy around Susta. "Gandak forms the international boundary between Nepal and India [Bihar]. said Khan. "Earlier, Susta was on the right bank of the Gandak, which falls in Nepal. But, in due course of time, the river has changed its route and Susta now falls on the left bank of the Gandak, which is controlled by India. Should the changing course of a river change the nationality of local residents?" [...] At the time the treaty was signed, Susta was on the right bank of the Gandak and a part of Nepal. But, over the years, the Gandak changed its course and Susta moved to the left bank, that is, on the Indian side of the river. [...] Since the Gandak’s course changed by accretion, the India-Nepal boundary must reflect the river’s current course. So, the village [Susta] falls in India, he added.