The deceased were identified as Pooran Mal (28), and his son Akshay, (9), the police said.
While injured Gokul (Pooran's relative), 30 years, was rushed to Jaipur's SMS Hospital, they said.
The trio were returning from Meth village to Khoi after attending marriage in the wee hours when the mishap occurred, they said.
Heavy vehicle fled the scene after the incident, they said, adding the bodies were spotted by locals who informed the police.
