Police said the accident took place around 9.30 AM near Barabanki village in Baran city Kotwali police station area.
The deceased were identified as Kanti Meghwal, a resident of Khori village of Atru area of Baran district, and her one-and-a-half-month-old granddaughter.
The woman was travelling with her son and daughter-in-law and granddaughter.
Police have lodged a case of negligent driving against the bus driver who fled from the spot after the mishap.
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