The driver lost control of the vehicle as it overturned at Bahoranpur bund under Jagdishpur police station of the district, Jagdishpur Sub-Division Assistant Superintendent of Police (ASP) Dayashankar said.
The bus was on its way to Bihiya Chaurasta from Damodarpur under Piro police station of the district.
The deceased have been identified as Raj Kumar Tiwary (40) and Devvanti Devi (50), he said adding that the injured have been admitted to a nearby private clinic.
The driver of the bus has been arrested, he added.
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