The mishap took place as vehicle carrying 14 persons collided with a tractor apparently due to oversight of the two drivers, police said.
A woman, identified as Talmun Nishan (60) and her grand daughter Rukhsana Khatun (16), died on the spot, a dozen others sustained injuries, they said.
The injured persons were rushed to a government hospital for treatment, police said, adding that tractor driver has been arrested for rash driving.