They said that the casualties might go up as many more people were trapped inside the vehicle.
The bus fell about 60-70-foot down on to the dry riverbed.
The site is about 42 km from the Sidhi district headquarters, he said.
The injured were admitted to the district hospital.
Both the district collector and the district police chief reached the spot and were supervising the rescue operation.
Further details were awaited, the officials added.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)