Amitabh Yash, a senior police official says the accident took place late Monday night in Sitapur town, about 80 kilometres southwest of state capital Lucknow, when the driver of the packed vehicle lost control while trying to overtake another vehicle.
Yash says the tractor-trolley was carrying 70 passengers and that 14 children were among the fatal casualties.
The injured, four of whom are in critical condition, are being treated at a local hospital.
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