The mishap took place between Bori and Semri villages when the victims were returning from Narmada riverbank at Budhni town where they had gone to immerse the ashes of a member of a family who had died recently, Rehti Police Station in-charge Anil Tiwari said.
As Bhopal-Budhni road is in a very bad condition, they took the longer Rehti-Nasrullaganj route.
All the three were killed on the spot, Tiwari said.
Two seriously injured persons including their neighbour were admitted in a hospital in Bhopal.