Three persons including two children were killed and 35 others were injured when a private bus overturned at Dharedi village, about 25 km from Ujjain.
The mishap took place on Sunday when the victims were returning to Helawadi from Dhar after attending a wedding, police said on Monday.
The reason for the overturning could be rash driving while going around a sharp turn, police said.
The deceased have been identified as Hasina (40), Samila Muzaffar (7) and Naznin (10). 35 others, including the driver, were injured.