"The gate was closed for the passage of the train. The bus crashed through the barriers and into the oncoming train due to the fog. The accident was the fault of the driver," the spokesman said.
Police could not confirm if all of those killed were on the bus or if some had been on the train.
A Moga administration official said that a charge of culpable homicide not amounting to murder had been registered against the bus driver, who allegedly jumped from the bus on seeing the oncoming train.
The driver was then said to have fled the scene.
The official said that the railway worker manning the crossing is also missing and that similar charges have been brought against him.