The burnt four-wheeler was spotted by residents of Dhobitola village, about 70 kms away from the district headquarters, in the culvert following which they informed the police about it.
Three unidentified bodies were also found inside the vehicle in a suspicious manner, Seoni's Superintendent of Police R P Singh said.
As per an initial probe, the deceased persons were from Tirodi village in Balaghat district, he said.
But, they were yet to be identified.
Denying that it was a Naxal-related incident, the SP said that the cause of the incident would soon be ascertained.