A bomb exploded on the railway tracks in central Assam's Dima Hasao district, damaging the track and disrupting movement of trains.
There was no casualty or injury as no train was passing at the time of the blast on Wednesday night, said Northeast Frontier Railway (NEF) Spokesman S Hajong.
The bomb exploded on the tracks between Mahur and Phiding railway stations at around 11 pm, Hajong said.
No train was scheduled to pass over the track at the time of the explosion, he said.
A part of the track was damaged by the bomb blast, he said. The up Barak Valley Express was detained at lower Haflong and its corresponding down 15693 at Maibong.