Three men on a motorcycle died after their vehicle lost balance and rammed into a divider on Pilibhit bypass, police said on Sunday.
They sustained head injuries as they were not wearing helmets, Superintendent of Police (city) Ravindra Kumar said.
In another incident on Bhuta-Bareilly road, a truck hit a motorcycle, making four people injured.
Police sent the injured for treatment to Bareilly, where Khushnaseeb (28) and her six-month-old daughter Alisha succumbed to their injuries.
The other two injured were still hospitalised, the police said.
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