A woman and her five-year-old son died, while nine other family members injured when their vehicle collided with a bus in Nayashahar area of Bikaner, police said.
The injured have been admitted to a hospital where the conditon of one of them is stated to be serious, they said.
In another mishap in Khori area of Jaisalmer district, two persons, including a woman, were killed and three others injured in a bus-tempo collision, they said, adding that the injured are undergoing treatment at a hospital.