A senior security official has claimed that the Maoists had carefully planned the detention of the New Delhi-Bhubaneswar Rajdhani Express and the five-hour hostage crisis on Tuesday.
The incident occurred at the Santhaldih railway crossing, near the Bhojudih railway station, and the tractor got stuck between the railway track and the gate.
In two separate attacks, suspected Maoists triggered a blast on the railway tracks in Jharkhand's Giridih district, damaging its fish plates, and also blew up a mobile tower in Hazaribag, the police said.
A policeman was on Tuesday gunned down by Maoists in Jharkhand's Sareikela-Kharsawan district as their 48-hour shutdown entered the second day.