One Kamla was returning with her nephew Akash to their village on a motorcycle when an unidentified car hit their two-wheeler near Kinana village, a police spokesperson said.
While Kamla died on the spot, Akash was injured, he said.
The car driver along with his vehicle fled from the spot, he said.
In a separate incident, 16-year-old Monu was killed and his uncle Sandeep injured when a speeding three-wheeler hit the motorcycle they were riding on near Bibipur village here, the spokesperson said.
Both the bodies were handed over to their families after post-mortem, he said, adding that investigations are underway in both the cases.