A 38-year-old man and his two-and-a-half-year-old nephew were charred to death and two others of the family suffered critical burns after the car they were travelling in hit a wall and caught fire in the Baran district near here. The car turned into a fireball with all the victims trapped inside after hitting a railing over a drain on the National Highway-27 opposite Hadoti panorama museum in Baran city, police said on Monday.