The elephants were hit by the 15611 Up Guwahati-Silchar passenger train at around 9-40 pm when the herd was trying to cross the railway track.
Earlier on December 10 a year ago, five elephants, including a pregnant female were killed when the Guwahati-Naharlagun Donyi Polo Express hit a herd crossing tracks near Balipara in Sonitpur district.
The accident took place around 9:30 pm near Habaipur railway station, almost 180 km east of the state capital.
A North East Frontier Railway spokesman said the trains maintain a speed limit of 20 km per hour in the elephant corridors. The train movement on the section was finally restored at 2 am today, he said.
The incident in an area known to be the elephant corridor. This issue figured in the meeting between forest minister Pramila Rani Brahma and officials of NF Railway in Hojai on Sunday. It is only because of the close coordination between field level officials of both the forest and railway departments that as many as 200 imminent dashing have been prevented this year alone.
The incident took place near the Hawaipur railway station in Nagaon district. "But the train collided with a few baby elephants surrounded by several adult elephants", the NF Railway CPRO said.
Train services were affected in the area as the carcasses of the elephants had not yet been removed.
"The 19 locations were decided at a meeting in December 21 in Lumding", a forest official said. Data provided by the Wildlife Division of Assam's Forest Department say electrocution, train-hit and attack by villagers killed 40 elephants in 2017.