The truck overturned on the auto rickshaw after the collision near Lohani Bigaha village of the district, Akbarpur police station SHO Sanjeev Mahuar said.
The dead, who also included a minor boy, and the injured were occupants of the ill-fated auto rickshaw, he said adding their identities could not be ascertained so far.
The driver and cleaner of the truck managed to escape from the spot after the incident.
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