A herd of elephants was crossing the rail tracks at Habaipur near Lumding reserve forest when the Guwahati-Silchar Express hit them last night, killing five on the spot, he said.
On November 19 past year, two adult elephants were killed after being hit by speeding train near Thakurkuchi railway station located close to Guwahati.
On December 10 past year, at least five adult elephants and a calf died after the Guwahati-Naharlagun Express hit them at Balipara in Assam's Sonitpur district.
The engine of the train got disconnected from the bogies due to the impact of the hit, leaving hundreds of passengers stranded.
"Our people are trying their best to prevent elephant casualties, but the railways seem to be taking such incidents lightly".
The incident has left Assam's Forest Minister Promila Rani Brahma fuming and she has ordered a magisterial inquiry into the tragic incident to find the details of the circumstances leading to the death of animals. The section was restored after the engine was put back on track nearly five hours later. However, based on inputs received from forest department a speed restriction of 30 kmph had been imposed and all trains were instructed to slow down while passing by issuing caution order to the loco pilots.
Four elephants were run over by a train and killed in northeast India.
Saturday's accident site falls under the Lanka forest range, the area's wildlife officials said.
Train services were affected in the area as the carcasses of the elephants had not yet been removed.
As per a 2011 census, there are 5,620 wild elephants in Assam, the highest in the country.
Green activists say encroachment and habitat destruction have forced elephants to stray out of traditional routes for food.