The incident took place on Multai Road in Betul late last night when a group of people was helping victims of an accident involving two motorbikes. Two persons were injured in the accident, he said.
Suddenly, a speeding dumper ran over them in darkness, leaving seven people dead on the spot, Bordehi police station in-charge RK Suryawanshi told reporters.
Their bodies were sent to the Multai Civil Hospital for autopsy, he said, adding efforts were on to trace the truck.
The injured motorcyclists were taken to Nagpur, about 100 km from Betul, for treatment by their family members, said Mr Suryawanshi.