The accident took place near Therbona village last night when the family was going to solemnise the marriage from Nala to Kundhait, the police said here.
The dead included father of the bride, her sister, brother-in-law and 9-month-old nephew, the sources said.
The driver of the vehicle fled after crashing the vehicle into a culvert, the police said.
The injured were shifted to nearby hospitals.
A 20-year-old girl was stabbed to death allegedly by a jilted lover in east Delhi this evening, police said.